When the tasks are done in a group, some students don’t contribute and they get the credit for the work they didn’t do

Collaborative learning includes ways of assuring the individual responsibility. (Felder and Brend, 1994). Students that don’t participate, usually fail their individual exams, short tests or homework. Another technique to assure the participation of all members is to ask a student, randomly, to expose the solution to the team, and afterwards give the whole group the same grade, based on that person’s answer. This technique is more effective when the teacher makes the effort of not asking this to the top students. These students usually take the responsibility of making sure that the other members of the group understand the solutions.

Another way is to make the students evaluate the other group members anonymously and list the names of those who actually contributed to the activity.