Abstract:
A presenter selection support apparatus including: a display unit configured to display one or more opinions input from each of a plurality of terminals; a selection unit configured to select any one of opinions that belongs to a certain group based on a predetermined criterion when the certain group among at least one group formed by being classified from opinions displayed in the display unit is designated; and an instruction unit configured to instruct a terminal, in which an opinion other than the selected opinion is input, to display a screen in which each of a plurality of items related to relevancy to the selected opinion is selectable, wherein the predetermined criterion is a criterion used to specify any one terminal based on the number of times that one item among the plurality of items is selected in the past in each of the plurality of terminals.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2013-124009 filed on Jun. 12, 2013, the entire contents of which are incorporated herein by reference. 
     FIELD 
     The embodiments discussed herein are related to a presenter selection support apparatus, a presenter selection support system and a presenter selection support method that support teaching operations in conducting a class, a seminar, a conference, etc. . . . 
     BACKGROUND 
     Multi-point conferences have been available using a plurality of information processing terminals connected with each other through a network. 
     In the multi-point conference using the information processing terminals, a technique has been proposed in which the priority level of right to speak is calculated using a function which has one or more of combinations of attributes of conference participants (e.g., a social status, an official post and rank, and a specialized field), a speech accumulated time, and the number of speech times, as variables in order to smoothly advance a multi-point conference according to the purpose thereof. 
     See, for example, Japanese Laid-open Patent Publication No. 08-274888. 
     Next-generation type educations using the information processing terminals by the teachers and students have recently been conducted in educational institutions of elementary and secondary schools. 
     A visual discussion support system has been provided for the next-generation type education. A class is conducted in such a manner that an assignment is transmitted from a teacher&#39;s terminal to a student&#39;s terminal and each student inputs an opinion for the assignment at the student&#39;s terminal to reply to the teacher&#39;s terminal. The opinions of respective students are collected in the teacher&#39;s terminal and opinions and approvals or disapprovals of all the students are displayed in a form of a matrix shape, which serves as a shared screen between the teacher and students, in a classroom. Also, the teacher allows each student to present his opinion regarding other opinions input by other students. 
     Here, when all of the students (e.g., several tens of students) in a class present their opinions, the same opinions may be included in the presented opinions and thus, the contents of presented opinions may be overlapped between the opinions to cause waste of time, which is problematic. Accordingly, it is efficient for conducting a class to allow only a representative to present an opinion regarding the same opinions. 
     In the meantime, in the conventional technology described above, a speaker is determined among a plurality of participants based on a priority level of a right to speak in accordance with a purpose of the conference and thus, a representative speaker for the same opinions may not be determined among the collected opinions for the assignment. 
     Therefore, even when the conventional technology described above is used in the next generation type education, it is difficult to grasp contents of several tens of opinions collected from respective students in a class for a short time. Accordingly, a representative of the students who have been regarded as having the same opinion may not be able to present the same opinion in an efficient manner. Further, among the students, there may be a student who tries to avoid presentation by replying to the teacher&#39;s terminal that “I have the same opinion as that of Mr. XX”, in spite of that the student has a different focus on the assignment. There is a problem that such a student cannot be determined. 
     One aspect of the present disclosure intends to suppress a student from trying to avoid presenting his opinion. 
     SUMMARY 
     According to an aspect of the embodiment, a presenter selection support apparatus includes: a display unit configured to display one or more opinions input from each of a plurality of terminals; a selection unit configured to select any one of opinions that belongs to a certain group based on a predetermined criterion when the opinion which belongs to the certain group among at least one group formed by being classified from opinions displayed in the display unit is designated; and an instruction unit configured to instruct a terminal, in which an opinion other than the selected opinion by the selection unit among opinions that belong to a certain group is input, to display a screen in which each of a plurality of items related to relevancy to the selected opinion is selectable. In the presenter selection apparatus, the predetermined criterion is a criterion used to specify any one terminal among terminals into which opinions that belongs to the certain group are input based on the number of times that one item among the plurality of items is selected in the past in each of the plurality of terminals and select the opinion input into the specified terminal. 
     Further, the object to be solved may be accomplished by a presenter selection support system, a presenter selection support method, a computer executable presenter selection support program that, when executed, causes a computer to function as the presenter selection support apparatus and a computer readable storage medium storing the computer executable presenter selection support program. 
     The object and advantages of the disclosure will be realized and attained by means of the elements and combinations particularly pointed out in the claims. It is to be understood that both the foregoing general descriptions and the following detailed descriptions are exemplary and explanatory, and are not restrictive of the invention, as claimed. 
     According to an aspect of the embodiment, it is possible to suppress a student from trying to avoid presenting his opinion. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a view illustrating an exemplary configuration of a presenter selection support system according to an embodiment of the present disclosure. 
         FIG. 2  is a view illustrating an exemplary hardware configuration of a server. 
         FIG. 3  is a view illustrating a display example of an opinion input screen. 
         FIG. 4  is a view illustrating a display example in which opinions of all the students are displayed in a shared screen. 
         FIG. 5  is a view illustrating an example of opinions displayed and grouped. 
         FIG. 6  is a view illustrating a display example in which a representative presenter is specified. 
         FIG. 7  is a view illustrating an example of opinion displayed in an enlarged scale. 
         FIG. 8  is a view illustrating a display example of the same opinion communication screen. 
         FIG. 9  is a view illustrating a masking display example. 
         FIG. 10A  and  FIG. 10B  are flowcharts for explaining a presenter selection support process. 
         FIG. 11  is a view illustrating an exemplary data configuration of a student database and an assignment database. 
         FIG. 12  is a view illustrating an exemplary data configuration of an opinion database. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinbelow, exemplary embodiments of the present disclosure will be described with reference to the drawings.  FIG. 1  is a view illustrating an exemplary configuration of a presenter selection support system according to an embodiment of the present disclosure. In  FIG. 1 , a presenter selection support system  1000  according to the embodiment includes a server  100 , a teacher terminal  1 , a plurality of student terminals  3  and a shared screen  8 . 
     The shared screen  8  is a screen referenced by a teacher  1   t  and a student  3   s . The shared screen  8  may be a screen projected onto a screen in a classroom through a projector. The server  100 , the teacher terminal  1 , the plurality of student terminals  3 , and the projector are connected with each other through a network  2 . In the configuration illustrated in  FIG. 1 , each of the server  100  and the teacher terminal  1  is exemplified as a separate computer apparatus, but may be incorporated into a single computer apparatus. 
     The teacher terminal  1  is a computer apparatus used by the teacher  1   t . The student terminal  3  is a computer apparatus used by each student  3   s . Each of the teacher terminal  1  and the student terminal  3  includes, for example, a control unit formed by a CPU, a display unit, an input unit and a communication unit. The display unit may be a touch panel type display unit which is also equipped with an input function. In this case, the input unit may be omitted. 
     The shared screen  8  is a screen projected onto a screen in a classroom and referenced by the teacher  1   t  and a plurality of students  3   s  in the classroom, and corresponds to the display unit. The display contents of the shared screen  8  are controlled by the server  100 . Further, the same contents of display as that of the shared screen  8  are also displayed on the teacher terminal  1  by the server  100 . 
     The server  100  is a computer apparatus and includes a presenter selection support processing unit  4  and a storage unit  130 . The server  100  may correspond to the presenter selection apparatus. The presenter selection support processing unit  4  is implemented by a presenter selection application installed in the server  100  and corresponds to a selection unit which selects a representative presenter who presents the opinion in representative of a group of the students who have the same opinion. The teacher terminal  1  and each student terminal  3  use the presenter selection application through the network  2 . 
     The presenter selection support processing unit  4  refers to an opinion DB  33  in which opinions and approval or disapproval for an assignment transmitted from the student terminals  3  are collected to determine students who have the truly same opinion among the students who claimed as having the same opinion for the assignment. 
     The presenter selection support processing unit  4  further includes a processing unit for teacher terminal  50  and a processing unit for student terminal  70 . The processing unit for teacher terminal  50  corresponds to a first selection unit which controls the processes related to the teacher terminal  1  and the shared screen  8  regarding a presenter selection process. The processing unit for student terminal  70  corresponds to a second selection unit which controls the processes related to the student terminal  3  regarding the presenter selection process. 
     The processing unit for teacher terminal  50  performs the processing for the teacher terminal  1  and specifies a student, who has the largest number of times being exempted from presentation (hereinafter, referred to as “the number of exempted presentations”) that indicates the number of times that the student has agreed on the opinion presented by the representative presenter in the past, from the group of students who have the same opinion as that of the representative presenter when the teacher  1   t  designates an opinion of any student. An opinion of the student who becomes the specified representative presenter is displayed on the shared screen  8  in an enlarged scale. A user interface, for displaying information for the teacher  1   t  on the teacher terminal  1  and also for receiving input by the teacher  1   t , is displayed on the teacher terminal  1  by the processing unit for teacher terminal  50 . The processing unit for teacher terminal  50  also performs the processes according to an input onto the teacher terminal  1  by the teacher  1   t.    
     The processing unit for student terminal  70  performs a processing for the student terminals  3  and counts the number of exempted presentations indicating the number of times that the student has agreed on the opinion presented by the representative presenter. 
     The number of exempted presentations indicates that the student has agreed on the opinions presented by the representative presenters in the past. In the meantime, the number of exempted presentations may indicate the number of times that a student has exempted from the presentation due to his agreement on the opinions presented by the representative presenters in the past. 
     A user interface, for displaying information for the student  3   s  on the student terminal  3  and also for receiving input by the student  3   s , is displayed on the student terminal  3  by the processing unit for student terminal  70 . The processing unit for student terminal  70  also performs a processing according to an input onto the student terminal  3  by the student  3 . 
     The shared screen  8  is a screen projected onto, for example, a screen in the classroom by the control of the presenter selection support processing unit  4 . 
     A student DB  31  is a database in which student information such as a student name or the number of exempted presentations is stored by being associated with every student ID. An assignment DB  32  is a database in which an assignment prepared by the teacher  1   t  in advance is stored by being associated with every assignment ID. An opinion DB  33  is a database in which, for example, selections of the approval or disapproval or the opinions of each student is stored by being associated with every assignment ID. 
       FIG. 2  is a view illustrating an exemplary hardware configuration of a server. In  FIG. 2 , the server  100  is a terminal controlled by a computer, and includes a CPU (Central Processing Unit)  11 , a main storage device  12 , an auxiliary storage device  13 , an input device  14 , a display device  15 , a communication interface (I/F)  17  and a drive device  18 , all connected to a bus B. 
     The CPU  11  controls the server  100  according to a program stored in the main storage device  12 . For example, RAM (Random Access Memory) or ROM (Read Only Memory) is used in the main storage device  12  and a program executed in the CPU  11 , data necessary for processing in the CPU  11  or data obtained by processing in the CPU  11  are stored in the main storage device  12 . Further, a portion of memory region of the main storage device  12  is allocated as a work area used for the processing in the CPU  11 . 
     A hard disk drive is used for the auxiliary storage device  13  and data such as programs for executing various processings are stored in the auxiliary storage device  13 . A portion of the program stored in the auxiliary storage device  13  is loaded to the main storage device  12  and is executed by the CPU  11  and thus, various processings are implemented. The storage unit  130  includes the main storage device  12  and/or the auxiliary storage device  13 . 
     The input device  14  is equipped with, for example, a mouse or keyboard, and is used for inputting various information necessary for the processing by the server  100  by an operational manager or a teacher. The display device  15  displays various information required for the processings under the control of the CPU  11 . The communication I/F  17  is an apparatus for connecting to, for example, the Internet or a LAN (Local Area Network) to control a communication between, for example, the teacher terminal  1  and the student terminal  3 . The communication by the communication I/F  17  is not limited to wired or wireless communication. 
     The program implementing the processing performed by the server  100  is provided to the server  100  by the storage unit  19 , such as a CD-ROM (Compact Disc Read-Only Memory). 
     The drive device  18  performs an interface with the storage unit  19  (e.g., CD-ROM) set in the drive device  18  and the server  100 . 
     Further, a program which implements the presenter selection process according to the embodiment to be described below is stored in the storage unit  19  and the program stored in the storage unit  19  is installed in the server  100  through the drive device  18 . The installed program becomes executable by the server  100 . 
     In the meantime, a medium storing the program is not limited to the CD-ROM and may include any type of computer readable medium. The computer readable medium may include a DVD disk, a portable recording medium such as a USB memory, or a semiconductor memory such as a flash memory, in addition to the CD-ROM. 
     Before explaining a specific processing flow, the presenter selection process according to the embodiment will be outlined with reference to screen examples of the teacher terminal  1 , the student terminal  3 , and the shared screen  8 . 
       FIG. 3  is a view illustrating a display example of an opinion input screen. The opinion input screen  21  illustrated in  FIG. 3  is displayed in a display unit of the student terminal  3 . The opinion input screen  21  includes an assignment  211 , an instruction content  212 , an approval or disapproval selection  213 , an opinion column  214 , a “Transmit to teacher” button  215 , and an “Opinion clear” button  216 . 
     The assignment  211  indicates an assignment designated by the teacher  1   t . The instruction content  212  designates matters that cause the student  3   s  to perform an action in the opinion input screen  21 . In this example, “Q001 How do you think about receiving debris?” is displayed in the assignment  211 . Further, the instruction content  212  indicates, for example, “Please write the approval or disapproval and the opinion for the assignment described above and press the “Transmit to teacher” button.” 
     The approval or disapproval selection  213  is an area for allowing the student  3   s  to select either an approval or disapproval for the assignment  211 . The opinion column  214  is an input area into which the student  3   s  may input the opinion. The student  3   s  inputs the opinion for the assignment  211  into the opinion column  214 . 
     The “Transmit to teacher” button  215  is a button for transmitting the result of approval or disapproval selected in the approval or disapproval selection  213  for the assignment  211  and an opinion input into the opinion column  214  by the student  3   s . The result of approval or disapproval and the opinion are transmitted from the student terminal  3  to the server  100  in response to the pressing of the “Transmit to teacher” button  215 . 
     The “Opinion clear” button  216  is a button for returning the result of the approval or disapproval selected in the approval or disapproval selection  213  for the assignment  211  and opinion input into the opinion column  214  by the student  3   s  to an initial state. The student  3   s  may press the “Opinion clear” button  216  to return the approval or disapproval selection  213  and the opinion column  214  to the initial state in order to perform a re-selection of the approval or disapproval and re-input of the opinion again. 
     The result of the approval or disapproval and opinion transmitted from the student terminal  3  are stored in the opinion DB  33  within the storage unit  130  of the server  100 . 
       FIG. 4  is a view illustrating a display example in which opinions of all the students are displayed in a shared screen. A display content  91  of the shared screen  8  illustrated in  FIG. 4  includes an assignment  911 , an opinion list  912 , and an “End of all presentations” button  913 . 
     The assignment  911  indicates an assignment designated by the teacher  1   t . In this example, “Assignment: How do you think about receiving debris?” is displayed in the assignment  911 . The opinion list  912  displays the contents of the opinions of all the students  3   s.    
     When the number of students in a class is forty (40), forty (40) contents of opinions are displayed, but in this example, a case where the number of all the students in a class is eight (8) is indicated in order to simplify descriptions. The results of approval or disapproval and the opinions of respective students A, B, C, D, E, F, G and H are displayed. The students A, B, C, D and E indicate an opinion of “∘ approval” for the assignment  911 . In the meantime, the students F, G and H indicate an opinion of “x disapproval” for the assignment  911 . 
     When the teacher  1   t  designates an opinion of any student from the opinion list  912  of the display content  91  displayed in the teacher terminal  1  using a pointer  9  in the teacher terminal  1 , the processing unit for teacher terminal  50  of the server  100  groups opinions that are the same as that of the designated opinion to display the grouped opinions in a different color for each group to allow the group to be easily discerned as illustrated in  FIG. 5 . 
       FIG. 5  is a view illustrating an example of opinions displayed and grouped. A display content  92  of the shared screen  8  illustrated in  FIG. 5  includes the assignment  911 , the opinion list  912 , and the “End of all presentations” button  913  and thus, the description thereof will be omitted. 
     In the opinion list  912  of the display content  92 , the opinions that are the same as that of the student C are grouped in the same group together with the opinion of the student C and the grouped opinions are displayed in a different background color to be easily discerned from the other opinions. The opinions in the group are displayed in the same background color. Grouping may be performed using, for example, conventional document similarity determination method. 
     In this example, the opinions of the students A, B, D and E together with the opinion of the student C are displayed in a different background color to distinguish from the opinions of the students F, G and H that are not grouped together with the opinion of the student C. The teacher  1   t  may visually and easily know the existence of the opinions of the students A, B, D and E that are the same as that of the designated student C. 
     In the opinion list  912 , a student who has the largest number of exempted presentations is specified as a representative presenter after the background color of the opinions within the group is changed. The opinion of the specified student  3   s  is highlighted in the opinion list  912  ( FIG. 6 ), and then, displayed on the shared screen  8  in an enlarged scale ( FIG. 7 ). The processing unit for teacher terminal  50  displays the opinion in an enlarged scale and allows a same opinion communication screen ( FIG. 8 ) to be displayed in the student terminal  3  of the other students  3   s  who has transmitted the same opinion as that of the designated student  3   s.    
       FIG. 6  is a view illustrating a display example in which a representative presenter is specified. A display content  93  of the shared screen  8  illustrated in  FIG. 6  includes the assignment  911 , the opinion list  912 , and the “End of all presentations” button  913  as in  FIG. 4 , and thus, the description thereof will be omitted. 
     In the opinion list  912  of the display content  93 , a highlighting display  93   a  indicates that the students A is specified as a representative presenter. Though the teacher  1   t  has designated the opinion of the student C but the student A is caused to present his opinion in representative of the students  3   s  who have the same opinion. 
       FIG. 7  is a view illustrating an example opinion displayed in an enlarged scale. The display content  94  illustrated in  FIG. 7  are the contents displayed in the shared screen  8  in an enlarged scale when the teacher  1   t  has designated the opinion of the student A, and includes an assignment  941 , an opinion  942 , an “End of enlargement display” button  943 , and an “End of all presentations” button  944 . Further, the display content  94  is also displayed in the teacher terminal  1 . The display content  94  is not displayed in the student terminals  3 . 
     The assignment  941  indicates an assignment designated by the teacher  1   t . In this example, “Assignment: How do you think about receiving debris?” is displayed in the assignment  941 . The opinion  942  indicates that the student A is presenting his opinion, and indicates the result of approval or disapproval and the opinion of the student A. 
     The “End of enlargement display” button  943  is a button for ending displaying of the display content  94 . In a case where a presentation of the student A is ended, when the teacher  1   t  presses the “End of enlargement display” button  943  from the display content  94  displayed in the teacher terminal  1 , the processing unit for teacher terminal  50  of the server  100  ends displaying of the display content  94 . 
     The “End of all presentations” button  944  is a button for ending displaying of the display content  94  and ending all presentations. In a case where a presentation of the student A is ended, when the teacher  1   t  presses the “End of enlargement display” button  944  from the display content  94  displayed in the teacher terminal  1 , the processing unit for teacher terminal  50  of the server  100  ends displaying of the display content  94  to end all presentations. 
       FIG. 8  is a view illustrating a displayed example of the same opinion communication screen.  FIG. 8  illustrates a display example of the same opinion communication screen  24  in a case where the student A designated by the teacher  1   t  is presenting his opinion. The same opinion communication screen  24  illustrated in  FIG. 8  is displayed in the display unit of the student terminals  3  of other students B, C, D and E who have transmitted the same opinion as that of the student A. The same opinion communication screen  24  includes a message  241 , an instruction content  242 , a “completely the same” button  243 , a “want to supplement” button  244 , and a “differ in opinion” button  245 . 
     The message  241  indicates that the student designated by the teacher  1   t  is presenting his opinion. The instruction content  242  designates matters that cause the student  3   s  to perform an action according to the instruction content in the same opinion communication screen  24 . In this example, a message of “Mr. A is presenting now.” is displayed in the message  241 . Further, the instruction content  242  indicates, for example, “Please press the button that matches your thought compared to the opinion of Mr. A.”. 
     The “completely the same” button  243  is a button for notifying that the student has the completely same opinion as that of Mr. A who is presenting his opinion. The “want to supplement” button  244  is a button for notifying that the student wants to supplement the opinion of Mr. A who is presenting his opinion. The “differ in opinion” button  245  is a button for notifying that the student has an opinion different from that of Mr. A who is presenting his opinion. 
     In this example, when the student A who is specified as a representative presenter by the processing unit for teacher terminal  50  is designated by the teacher  1   t , the students B, C, D and E other than the student A in the same group are determined as candidates having the same opinion. The same opinion communication screen  24  is displayed in the student terminals  3  of the students B, C, D and E that are the candidates having the same opinion. The same opinion communication screen  24  is not displayed in the terminals  3  of the students F, G and H that do not have the same opinion as that of the student A, that is, do not belong to the same group as a group to which the student A belongs. Further, even when a student belongs to the same group as the group to which the student A belongs, the same opinion communication screen  24  is not displayed in the terminal  3  of the student for which a same opinion flag (described later) is set as “9”, “1” or “2”. 
     It is assumed that the students B, C, D and E have performed the following manipulation. • The student B has pressed the “completely the same” button  243 . • The student C has pressed the “completely the same” button  243  intending to avoid his presentation. • The student D did not press any button. • The student E has pressed the “want to supplement” button  244 . In the meantime, the student who has pressed the “differ in opinion” button  245  may be handled as a student who has an opinion which is not the same opinion as that of the student A. 
     In a case where displaying the opinion of the student A in an enlarged scale ( FIG. 7 ) is ended, that is, when the presentation of the student A is ended, the display content  95  as illustrated in  FIG. 9  is displayed in the shared screen  8 .  FIG. 9  is a view illustrating a masking display example. The display content  95  of the shared screen  8  illustrated in  FIG. 9  includes, for example, the assignment  911 , the opinion list  912 , or the “End of all presentations” button  913  similarly to  FIG. 4 , and thus the description thereof will be omitted. 
     An auxiliary display  95   a  of “Presentation ended” is displayed in a color, such as red color, which is different from other character color for the opinion of the student A who has ended presentation in the opinion list  912  of the display content  95 . 
     An auxiliary display  95   b  is displayed in a color, such as green color, which is different from other character color for the opinion of the students who have pressed a button in the “same opinion communication screen” among the students B, C, D and E. The students who have pressed the buttons are the students B, C and E. Since the student B and the student C have pressed the “completely the same” button  243 , the auxiliary display  95   b  indicating “Completely the same as that of Mr. A” is displayed in the opinions of the student B and student C, and an auxiliary display  95   e  indicating “want to supplement” is displayed in the opinion of the student E. 
     The opinion of the student A who is the representative presenter and the opinions of the student B and student C who have pressed the “completely the same” button  243  for the opinion presented by the student A are displayed with being masked in the opinion list  912  of the display content  93 . The opinions of the students D, E, F, G and H are maintained in their original displays. 
     The displaying as described above in the shared screen  8  is performed at the teacher terminal  1  as well. Thereafter, when the teacher  1   t  designates the student E using a pointer  9  in order to supplement the opinion which has been presented by the student A, the same processing as the processing for the case where the student C is designated ( FIG. 4 ) is repeated. 
     A presenter selection support process by the presenter selection support processing unit  4  in the server  100  as described above will be described with reference to  FIG. 10A  and  FIG. 10B .  FIG. 10A  and  FIG. 10B  are flowcharts for explaining a presenter selection support process. In  FIG. 10A  and  FIG. 10B , the processes from step S 51  to step S 61  correspond to the processes to be performed by the processing unit for teacher terminal  50 . Further, the processes from step S 71  to step S 77  correspond to the processes to be performed by the processing unit for student terminal  70 . In  FIG. 10A  and  FIG. 10B , explanatory notes of *a, *b and *c correspond to the changes of an “opinion flag” value illustrated in  FIG. 12 . 
     When the teacher  1   t  selects an assignment among the assignments stored in the assignment DB  32 , the processing unit for teacher terminal  50  transmits the assignment selected by the teacher  1   t  to the student terminal  3  of the student  3   s  registered in the student DB  31  (step S 51 ). 
     The processing unit for student terminal  70  receives the assignment (step S 71 ). The opinion input screen  21  as illustrated in  FIG. 3  is displayed in the student terminal  3  by the processing unit for student terminal  70 . The student  3   s  selects an approval or disapproval for the assignment and inputs an opinion in the opinion input screen  21 , and transmits the selected approval or disapproval and the input opinion to the teacher  1   t  (step S 72 ). Further, the processing unit for student terminal  70  associates the result of the selected approval or disapproval and the input opinion with a student ID to be stored in the opinion DB  33 . 
     The processing unit for teacher terminal  50  refers to the opinion DB  33  to display the opinions of all the students ( FIG. 4 ) in the shared screen  8  (step S 52 ). The opinions of all the students ( FIG. 4 ) are also displayed in the teacher terminal  1 . 
     When the teacher  1   t  designates an opinion of any student C from the opinion list  912  ( FIG. 4 ) (step S 53 ), the processing unit for teacher terminal  50  refers to the opinion DB  33  to specify the students A, B, D and E, that belong to the group regarded as a group to which the same opinions as that of the student C belongs and have the “opinion flag” indicated as a value other than a value of “9”, “1” or “2” (step S 54 ). 
     The processing unit for teacher terminal  50  refers to the student DB  31  to specify the student A, who has the largest number of exempted presentations, among the specified students A, B, D and E to set the “opinion flag” of the student A of the opinion DB  33  as “9” (step S 55 ). Further, the processing unit for teacher terminal  50  instructs the processing unit for student terminal  70  to display the same opinion communication screen  24  ( FIG. 8 ) in the student terminals  3  of the students B, C, D and E (step S 73 ). 
     Also, the processing unit for teacher terminal  50  resets the number of exempted presentations of the student A of the student DB  31  (step S 56 ). Further, the processing unit for teacher terminal  50  sets the “opinion flag” of the students B, C, D and E of the opinion DB  33  as zero (step S 57 ). 
     The processing unit for teacher terminal  50  displays the opinion of the student A in the shared screen  8  in an enlarged scale ( FIG. 7 ) and starts measurement of “pressible time” (step S 58 ). Also, when the presentation of the student A is ended, the processing unit for teacher terminal  50  ends displaying the opinion of the student A in an enlarged scale in the shared screen  8  ( FIG. 7 ), and ends the measurement of “pressible time” (step S 59 ). 
     The processing unit for student terminal  70  displays the same opinion communication screen  24  ( FIG. 8 ) in the student terminals  3  of the students B, C, D and E (step S 73 ) according to the instruction to display by the processing unit for teacher terminal  50  at step S 55 . The student A is presenting his opinion. 
     Also, each of the students B, C, D and E presses any one of the buttons  243 ,  244 ,  245  in the same opinion communication screen  24  ( FIG. 8 ) displayed in the student terminal  3  (step S 74 ). The students B, C, D and E may select the button in the same opinion communication screen  24  ( FIG. 8 ) only during displaying an opinion in an enlarge scale ( FIG. 5 ), that is, during the pressible time. When the pressing of the button is detected, the processing unit for student terminal  70  records the “opinion flag” associated with the student ID of each of the students B, C, D and E of the opinion DB  33  (step S 75 ). Manipulations for the “opinion flag” are as follows. • When the “completely the same” button  243  is pressed, the “opinion flag” in the opinion DB  33  is set as “1”. • When the “want to supplement” button  244  is pressed, the “opinion flag” in the opinion DB  33  is set as “2”. • When the “differ in opinion” button  245  is pressed, the “opinion flag” in the opinion DB  33  is set as “0”. 
     The processing unit for student terminal  70  determines whether the “opinion flag” indicates “1” (step S 76 ). When it is determined that the “opinion flag” does not indicate “1”, a process in the processing unit for student terminal  70  is ended. Otherwise, when any of the “opinion flag” indicates “1”, the processing unit for student terminal  70  counts up the number of exempted presentations associated with the relevant student IDs of the students B, C, D or E of the student DB (step S 77 ), and the process in the processing unit for student terminal  70  is ended. 
     The processing unit for teacher terminal  50  refers to the opinion DB  33  according to the end of the process in the processing unit for student terminal  70  to mask the opinion of the student who has the “opinion flag” indicating the number of “9” or “1” and perform an auxiliary display depending on the selection of the button in the same opinion communication screen  24  ( FIG. 6 ) of the students B, C, D and E, thereby redisplaying the shared screen  8  (step S 60 ). 
     The auxiliary displays indicates that when the “opinion flag” is the number “9”, the opinion is “presentation is ended”, when the “opinion flag” is the number of “1”, the opinion is “completely the same”, and when the “opinion flag” is the number of “2”, the opinion is “want to supplement”. 
     The processing unit for teacher terminal  50  determines whether the “End of all presentations” button  913  or  944  is pressed by the teacher  1   t  (step S 61 ). When the depression of the “End of all presentations” the button  913  or  944  is not detected, the processing unit for teacher terminal  50  returns to step S 53 , and repeats the processes described above. Further, the process by the processing unit for student terminal  70  is repeated by being associated with the process by the processing unit for teacher terminal  50 . 
       FIG. 11  and  FIG. 12  are views illustrating exemplary data configuration of databases.  FIG. 11  illustrates exemplary data configuration of the student DB  31  and the assignment DB  32  and  FIG. 12  illustrates an exemplary data configuration of the opinion database  33 . 
     The student DB  31  includes fields for student information, such as student ID, name or number of exempted presentations. A student ID in the student ID field indicates identification information for specifying the student  3   s , the name in the name field indicates a full name of the student  3   s  and the number of exempted presentations in the name number of exempted presentations field indicating the number of times that the student is exempted from presentation since he has the same opinion as that of other students. 
     In this example, the student information, such as the name “A” or the number of exempted presentations “4”, is associated with the student ID of “ST001”. The number of exempted presentations of the student is reset when the student presents his opinion, and is set as zero (step S 56  of  FIG. 10A ). 
     When the representative presenter is the first presenter, the number of exempted presentations is reset and when presentation of the representative presenter corresponds to the after-first-presentation of a representative presenter, the number of exempted presentations may be changed to a value obtained by setting the number of exempted presentations to a predetermined percentage of the number of exempted presentations instead of resetting the number of exempted presentations. Further, the number of exempted presentations of all the students may be reset at the beginning of every month. 
     The assignment DB  32  includes fields for assignment ID and assignment. An assignment ID indicates identification information for specifying an assignment and the assignment indicates the content of the assignment prepared in advance by the teacher  1   t . In this example, the assignment specified the assignment ID of “Q001” is “How do you think about receiving debris?” 
     The opinion DB  33  includes fields for assignment ID, student ID, approval or disapproval, and opinion and opinion flag. The assignment ID indicates an assignment ID registered in the assignment DB  32 . The student ID indicates a student ID registered in the student DB  31 . In this example, student name is indicated in the “( )” in addition to the student ID, but the student name may be omitted. 
     The approval or disapproval field indicates the result of approval or disapproval selected by the student  3   s  about the assignment in the opinion input screen  21  ( FIG. 3 ). The opinion field indicates an opinion input by the student  3   s  about the assignment in the opinion input screen  21 . 
     The opinion flag field indicates an opinion transition of the student  3   s  regarding the presentation. In  FIG. 12 , a value of an opinion flag in the opinion flag field is originally indicated as “1”, but the opinion flag value is indicated as a separate value for each event such as a button selection of the student  3   s  in order to indicate the opinion transition. Specifically, the opinion flags indicates values that are set in each state of “*a: upon designation”, “*b: upon pressing” and “*c: upon re-displaying” illustrated in  FIG. 10A  and  FIG. 10B . 
     The opinion DB  33  illustrated in  FIG. 12  indicates an example of data in a case where the student A, who is designated by the teacher  1   t , having the student ID of “ST001” has presented his opinion about the assignment “How do you think about receiving debris?” specified by the assignment ID. Data regarding the other assignments are stored and managed in the same configuration in the opinion DB  33 . 
     Descriptions will be made on a case where the student C is arbitrarily selected by the teacher  1   t  in the opinion list  912  of the display content  91  of the shared screen  8  illustrated in  FIG. 4 . 
     In the example of data, the student A having the student ID of “ST001” has an “approval” for the assignment and expresses an opinion of “We are to help someone in need.” (step S 72  of  FIG. 10A ). The student A is designated by the teacher  1   t  as a representative presenter (“*a: upon designation”: the display content  93  of the shared screen  8  of  FIG. 6  and step S 55  of  FIG. 10A ) and thus, the number “9” is set in the opinion flag of the student A (step S 56  of  FIG. 10A ). 
     Since the student A is the representative presenter, events of the “*b: upon pressing” and “*c: upon re-displaying” do not exist in a processing for the student A. Accordingly, the opinion flag of the student A is not changed and thus, indicated as a symbol “/” for convenience of explanation. The symbol “/” simply indicates that the opinion flag is not changed and does not indicate the value of the opinion flag. Accordingly, at “*c: upon re-displaying”, the opinion flag of the student A indicates the number “9” which is set at “*a: upon designation”. The opinion of the student A is masked upon redisplaying ( FIG. 9 ) of the shared screen  8  and exempted from the next candidates for presentation. 
     The processing unit for teacher terminal  50  sets the opinion flag of the students B, D and E, who have the same opinion as that of the designated student C and the value of opinion flag other than “9”, “1” or “2”, as “0” (step S 57  of  FIG. 10B ) according to designation of the student C who is arbitrarily selected by the teacher  1   t . The opinion flag for other students including the student F other than the students A, B, C, D and E indicates the symbol “-” which indicates an unset. 
     The student B having the student ID of “ST002” has an “approval” for the assignment and expresses an opinion of “I think we are to cooperate with others for these things” (step S 72  of  FIG. 10A ). Due to this opinion, the student B is determined as having the same opinion as that of the student C by the processing unit for teacher terminal  50  and thus, the opinion flag of the student B is set as “0” (*a: upon designation: step S 57  of  FIG. 10B ). 
     Further, the student B selects the “completely the same” button  243  in the same opinion communication screen  24  ( FIG. 8 ) displayed due to the determination that the student B has the same opinion as that of the student C (*b: upon pressing). The opinion flag of the student B is set as “1” by the processing unit for student terminal  70  (step S 75  of  FIG. 10B ). When the opinion list  912  is redisplayed in the shared screen  8  (*c: re-displaying), and the opinion flag of the student B indicates the number “1”. Upon redisplaying of the shared screen  8  ( FIG. 9 ), the opinion of the student B is masked by the processing unit for teacher terminal  50  (step S 60  of  FIG. 10B ) and exempted from the next candidates for presentation. The number of exempted presentations of the student B is counted up. 
     The student C having the student ID of “ST003” has an “approval” for the assignment and expresses an opinion of “If we all help together, there will be no problems.” (step S 72  of  FIG. 10A ). The opinion flag of the student C designated by the teacher  1   t  is set as “0” (*a: upon designation: step S 57  of  FIG. 10B ). 
     Further, the student C selects the “completely the same” button  243  in the same opinion communication screen  24  ( FIG. 8 ) displayed in the student terminal  3  of the student C (*b: upon pressing). The opinion flag of the student C is set as “1” by the processing unit for student terminal  70  (step S 75  of  FIG. 10B ). When the opinion list  912  is redisplayed in the shared screen  8  (*c: re-displaying), the opinion flag of the student C indicates the number “1”. Upon redisplaying of the shared screen  8  ( FIG. 9 ), the opinion of the student C is masked by the processing unit for teacher terminal  50  (step S 60  of  FIG. 10B ) and exempted from the next candidates for presentation. The number of exempted presentations of the student B is counted up. 
     The student D having the student ID of “ST004” has an “approval” for the assignment and expresses an opinion of “It may be used for burial.” (step S 72  of  FIG. 10A ). Due to this opinion, the student D is determined as having the same opinion as that of the student C by the processing unit for teacher terminal  50  and thus, the opinion flag of the student D is set as “0” (*a: upon designation: step S 55  of  FIG. 10A ). 
     Further, the student D did not select any one of the buttons  243 ,  244 ,  245  during displaying of the shared screen  8  in an enlarged scale in the same opinion communication screen  24  ( FIG. 6 ) displayed due to the determination that the student D has the same opinion as that of the student A (*b: upon pressing). The opinion flag of the student D is erased and changed to the symbol “-” (null), which indicates non-setting, by the processing unit for student terminal  70  (step S 75  of  FIG. 10B ). 
     The opinion flag of the student D is not “1” and thus, a determination process for the student D is not performed by the processing unit for student terminal  70 . Thereafter, when the opinion list  912  is redisplayed in the shared screen  8  (“*c: upon re-displaying”), the opinion flag of the student D indicates the symbol “-” (null) which indicates non-setting. The opinion flag of the student D is not masked (step S 60  of  FIG. 10B ) upon re-displaying of the shared screen  8  ( FIG. 8 ). The student D becomes the next candidate for presentation. 
     The student E having the student ID of “ST005” has an “approval” for the assignment and expresses the opinion of “There is no difference between us. A disaster due to earthquake may occur anywhere.” (step S 72  of  FIG. 10A ). Due to this opinion, the student E is determined as having the same opinion as that of the student A by the processing unit for teacher terminal  50  and thus, the opinion flag of the student E is set as “0” (*a: upon designation: step S 57  of  FIG. 10B ). 
     Further, the student E selects the “want to supplement” button  244  in the same opinion communication screen  24  ( FIG. 8 ) displayed due to the determination that the student E has the same opinion as that of the student C (*b: upon pressing). The opinion flag of the student E is set as “2” by the processing unit for student terminal  70  (step S 75  of  FIG. 10B ). 
     Since the opinion flag of the student E does not indicate “1”, that is, the student E did not press the “completely the same” button  243 , counting up of the number of exempted presentations (step S 77  of  FIG. 10B ) are suppressed and are not performed. 
     Thereafter, when the opinion list  912  is redisplayed in the shared screen  8 , the opinion flag of the student E indicates “2”. Upon redisplaying (*c: re-displaying) of the shared screen  8 , the opinion of the student E is not masked (step S 60  of  FIG. 10B ). The student E becomes the next candidate for presentation. 
     The student F having the student ID of “ST006” has a “disapproval” for the assignment and expresses an opinion of “There is a problem for the place. There will not be any remaining places” (step S 72  of  FIG. 10A ). Due to this opinion, the student F is determined as having an opinion different from that of the student A and thus, no value is set in the opinion flag, that is, the opinion flag of the student F maintains an unset state (*a: upon designation: step S 55  of  FIG. 10A ). 
     Further, the events of the “*b: upon pressing” does not exist in a processing for the student C due to the determination that the opinion of the student F is different from that of the student C. Accordingly, the opinion flag of the student F is not changed. Accordingly, the opinion flag of the student F maintains the unset state at “*c: upon redisplaying”. That is, the opinion of the student F is not masked (step S 60  of  FIG. 10B ) upon redisplaying of the shared screen  8  (“*c: upon re-displaying”). 
     The processing for the student G and the student H are the same as that of the student F and thus, description thereof will be omitted. The opinions of the student G and student H are not masked (step S 60  of  FIG. 10B ) upon redisplaying of the shared screen  8  (“*c: upon re-displaying”). 
     As a result, the students D and E are displayed to be easily discerned as the next candidates for presentation upon redisplaying of the shared screen  8  ( FIG. 9 ) except for the student A who is the representative presenter and the students B and C among the student C and a group of students A, B, D and E who have the same opinion as that of the student C. 
     In a case where the student E is designated as a representative presenter after the student A and then, supplements the opinion of the student A, who is the ex-representative presenter, upon redisplaying of the shared screen  8  ( FIG. 9 ), the number of exempted presentations may be changed to a value according to a predetermined percentage. In this case, when the predetermined percentage is “50%”, the number of exempted presentations of the student E is changed from the number “2” to the number “1”. Further, when the student E has presented an opinion different from that of the ex-representative presenter, the predetermined percentage may be set as “90%”. That is, the number of exempted presentations may be reduced according to the percentage of a kind of opinion such as a supplemental opinion or different opinion. 
     Specifically, it may be desirable to adopt a reduction percentage weighted configuration in which a reduction percentage is designated in such a manner that about the opinion of the representative presenter, when the “completely the same” button  243  is pressed in the same opinion communication screen  24  ( FIG. 8 ), the number of exempted presentations is reduced by “20%”, when the “want to supplement” button  244  is pressed, the number of exempted presentations is reduced by “50%”, and when the “differ in opinion” button  245  is pressed and any of the buttons  243 ,  244  and  245  is not pressed, the number of exempted presentations is reduced by “90%”, in the process of step S 56  of  FIG. 10A . 
     In a case where the student E, who has the opinion of supplementing the opinion of the student A who is the ex-representative presenter, is designated by the teacher  1   t  (step S 53  of  FIG. 10A ), when referring to the opinion DB  33  illustrated in  FIG. 12 , a student who belongs to a group to which opinions regarded as the same opinion of the student E belongs and has the “opinion flag” other than “9”, “1” and “2” is the student D (step S 54  of  FIG. 10A ), and the students who have the “opinion flag” other than “9”, “1” and “2” in the same group are only the student E and the student D. 
     When referring to the student DB  31  ( FIG. 11 ), the number of exempted presentations of the student D is “0” and the number of exempted presentations of the student E is “2” and thus, the student E who has the largest number of exempted presentations is specified as the representative presenter (step S 55  of  FIG. 10A ). The current opinion flag “2” of the student E of the opinion DB  33  is temporarily stored in a work area of the storage unit  130  and then, set the opinion flag as “9”. In this case, the same opinion communication screen  24  ( FIG. 8 ) is displayed only in the student terminal  3  of the student D. 
     When the reduction percentage weighted configuration described above is adopted, instead of resetting the number of exempted presentations of the student E of the student DB  31 , the number of exempted presentations of the student E of the student DB  31  is reduced from “2” to “1” (step S 56  of  FIG. 10A ) based on the reduction percentage of “50%” which corresponds to the opinion flag “2” (that is, “want to supplement”) temporarily stored in the work area. 
     In this example, the opinion flag and the reduction percentage of the number of exempted presentations are made to correspond with each other as follows: • The reduction percentage of “20%” corresponds with the opinion flag of “1” (that is, “completely the same”). • The reduction percentage of “50%” corresponds with the opinion flag of “2” (that is, “want to supplement”). • The reduction percentage of “90%” corresponds with the opinion flag “-” (that is, “differ in opinion” or none of button pressed). 
     Further, the number of exempted presentations is not limited to the reduction percentage of the number of exempted presentations, but may be appropriately set by the teacher  1   t  depending on a class subject and or contents of a class. 
     In a case where a presenter selection support process according to the embodiment as described above is not performed, when the number of enrolled students of a class is multiple (e.g., forty (40) students), the teacher  1   t  is not easily able to group the students  3   c  having the same opinion. Accordingly, the teacher  1   t  either causes each student  3   s  of forty (40) students  3   s  divided from the opinion list  812  of the shared screen  8  to arbitrarily present his opinion one by one or reads the opinion of each student  3   s . Since time is wasted by merely grasping the contents of the opinions of each student  3   s , it may be difficult to efficiently collect opinions of all the students within a class hour. 
     Further, in a case where the teacher  1   t  actually designates and causes a student  3   s  to present his opinion, the student  3   s  may easily express as “I have the same opinion as that of Mr. XX” and thus, time may be wasted when an attempt to cover various opinions is made. Further, there is a student who expresses his opinion easily as “I have the same opinion as that of Mr. XX” to avoid presenting his opinion though the student  3   s  has a different viewpoint, among the students  3   s  who speak such a statement. 
     However, in a case where the presenter selection support process according to the embodiment is applied, a student  3   s , who has the largest number of times that he has selected an item indicating that the opinion of the student is the same as a presented opinion from choices regarding the presented opinion, is specified as the representative presenter. Therefore, it is possible to suppress the student  3   c  from trying to avoid his presentation by easily expressing that he has the same opinion as that of the representative presenter. 
     The opinion of the student  3   s  having the “same opinion” as that of a representative presenter is displayed, for example, in masking and thus, the teacher  1   t  may exclude the student  3   s  who has the “same opinion” from the next presenter candidates. Further, a supplemental display is made on the opinion of the student  3   s  who wants to supplement the opinion of the representative presenter and thus, the teacher  1   t  may easily grasp a student  3   s  who is going to present his opinion next. Accordingly, the teacher  1   t  may efficiently designate a plurality of students  3   s  who have various opinions within a class hour. 
     In the present embodiment, one opinion is selected so as to determine a representative presenter based on the number of times that the student has exempted from presentations in the past among the same opinions as the designated opinion in the plurality of displayed opinions and thus, it is possible to suppress the student from being continuously exempted from opinion presentation. 
     From the matters described above, the embodiment may be summarized as follows. 
     (1) There is a type of class in which opinions inputted in the student terminal  3  are collected and displayed in a screen (shared screen  8 ) by the server  100  (or the teacher terminal  1 ) and a student  3   s  is caused to present his opinion regarding an opinion designated by manipulation of the teacher  1   t.    
     (2) In the type of class as described in paragraph (1), when the student  3   s  is caused to present his opinion against each of the displayed opinions, it is inefficient in use of time. 
     (3) In paragraph (2), in a case where several students  3   s  who have similar opinions exist, an efficient method of conducting the class is that one student  3   s  representative of several students  3   s  is caused to present the opinion and the other students  3   s  are caused to present supplementary matters. 
     (4) In the case of paragraph (3), the student  3   s  other than the representative presenter may present that “I have the same opinion” as that of the presenter to try to avoid presenting his opinion though the student  3   s  although actually having some difference. 
     (5) In the embodiment, in consideration of paragraph (4), when the method as described in paragraph (3) is performed, it is possible to suppress the student  3   s  from avoiding his opinion presentation by expressing “I have the same opinion” as that of the representative presenter. 
     The present disclosure is not limited to the specific embodiments described above but various changes and modification may be made thereto without departing from the scope of claims. 
     All examples and conditional language recited herein are intended for pedagogical purposes to aid the reader in understanding the invention and the concepts contributed by the inventor to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions, nor does the organization of such examples in the specification relate to a showing of the superiority and inferiority of the invention. Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.