Revision of classwork should take place on a regular basis throughout the course, “a little and often”, rather than leaving it all until immediately before a test or exam. This is a much more efficient way to learn, will give you a much better understanding of Physics, rather than a surface knowledge of the facts , and will allow you to retain information for a longer period of time.
We would recommend at least 15 minutes 3 times a week of pure revision. If you are studying for longer than this make sure you take regular breaks.
Research shows that we learn best when we are actively involved in learning. Simply reading your Summary Notes or a textbook is, for most people, not an effective way to learn and can be an inefficient use of your time.
Make sure you make good use of your time!
Have a look at The Learning Scientists website for some ideas about how to revise effectively.
Watch the video How to Mind Map with Tony Buzan for advice on how to make effective use of mind maps