Note taking is one of a good method to help you to memorize the lessons. Here are several reasons that should be considered:
1. Organized notes will help you identify the core of important ideas in the lecture.
2. A permanent record will help you to learn and remember later.
3. The lecture may contain information not available anywhere else. This will be your only chance to learn it.
4. Lecture is where you learn what your instructor thinks is important, and he makes up the exams.
5. Class assignments are usually given in the lecture.
6. The underlying organization and purpose of the lecture will become clear through note taking.
So, Have you done it so far ?