When memorizing, also keep in mind that interference can occur. In fact, learning new material can interfere or cause you to forget old material. Try to memorize material for each class on a different day. This is also why it helps to review the night before, or a few hours before, the test. You have less chance of other information interfering with the acquisition of the test material.
Attendance is crucial.
Studies have found a positive correlation between class attendance and grades. In fact the higher the attendance rate, the higher your grades are likely to be. Most professors believe that their lecture material is important. In order to learn more in class it helps to become involved by participating in class discussions. Asking questions for clarification and maintaining eye contact with your professor can increase your involvement and enhance concentration of the class discussion.