I would like to have a self-test to check the degree of mastery of knowledge. And it's up to the situation how I felt about the mastery of the knowledge in class, if I can imagine that a chart included all of the knowledge, I would like to participate in recreational activities. If I can't remember all the knowledge, I would like to review the knowledge again before the next class starts, as it helps me to control my time and also get a good grade at the same time.