The task of evaluating students in class is a tough job to be carried out even in middle size classrooms without some sort of technologies support. Therefore, lecturer in some Brazilian institutions are adopting varieties forms of self-evaluation strategies to overcome this problem. One drawback is the difficulty of deciding on fair and accurate assessment final marks, which should also take into account the lecturer judgment evaluation. We propose in this work some strategies to deal with this problem by using the Moodle as the interface between the lecturer and our proposed system. The results have two folds. On the one hand, we show that our methods also help to detect responsible students more accurately. On the other, using our methods, we show which students need closer assistance because they are not able to recognize the right answer among some others of their classmates on the second time they are exposed to the same activity.