The teacher can choose either to share the board with the student or to lock the student out. Teachers and students also have private workspaces for note taking which only they can see. With document sharing the teacher can present information to students on screen. No need for handouts. If necessary the student can print out the information or save it to a disk.
Students can present their assignments to the teacher on screen.
The teacher can make corrections with any of the annotation tools. Through application sharing the teacher can present a document and change it in its original application. The changes can then be saved to the original application. The teacher can share the application with students even if students' PCs do not have that application Some of the advantages to teaching from the desktop are obvious. The student can finish a shift at work and go directly to class without going home or driving several miles.