When homework was not marked, cheating disappeared almost completely (Figure 7.2), and, whereas the number of students who did not do their homework increased, so too did the number of students who did it on their own. That is, in situations where homework was marked, approximately 50% didn’t do it or cheated. When homework was not marked, this percentage drops to approximately 40%—not marking homework had a positive effect on how many students did their homework.
