http://ww2.kqed.org/mindshift/2014/10/16/studying-with-quizzes-helps-make-sure-the-material-sticks/

What this article says is that when you study, testing yourself on an idea or concept you’re learning helps you remember it. Every time you remember something, a new connection is formed to new sensations and contexts. “The more things you have connected to the information, the easier it is to pull the material out, because lots of different ideas can lead you to that particular material”.  Studying in several different ways, making quizzes for yourself, using tools like quizlet.com, and reviewing Cornell notes are great ways to be sure that not only are you LEARNING the lesson material, but able to REMEMBER it during the test!