Reviewing your lesson daily
The human brain maturally stores repeated impressions or ideas fed to it by our senses, thoughts and imagnations. This is what happens when you review your daily lessons. They are automatically preserved in your memory like a taped information. An they remain there until you change the contents. You do not need to exert great efforts at memorizing something that has already been strongly and repeatedly kept. This recorded information only seems to disapper when you stop recalling and using it.
Realize the importance of reviewing your lessons at the end of the day. Reading alone will make the lesson stick to your mind tightly. Give yourself a definite study time afte afternoon snack when you reach home. 
Whatever level or year you are in, you certainly have two or three hours free time after classes. Bring your notes to a cool, most quiet place in the house and read your notes with understaning, with the intention of reviewing and memorizing. Doing this daily is much easier than trying to swallow a whole weeks lecture notes. If you miss a day’s review of the lessons, try to make it up the folowing day. But never neglect reading and reviewing before the week is over. Or surprise quiz or test will scare you.