classes:  lecturer. Do not give assignments to students and then let the students in class do the work themselves for a long period of time.  curriculum. Do not give assignments to students and then let the students in class do the work themselves for a long period of time.  facility. Do not give assignments to students and then let the students in class do the work themselves for a long period of time.  general. Do not give assignments to students and then let the students in class do the work themselves for a long period of time.