ABSTRACT
Higher education is very dierent from elementary education where the knowledge in university is not just restricted to books and it takes orders of magnitude deeper and broader than elementary education’s. For the most part of the time, the university teachers only lecture their students about key points of certain knowledge, and some teachers even introduce the advanced technology of the subjects. The amount of information is huge and the process of classes is fast. The only way that university students want to learn those subjects well is that they need to study on their own.
