Remembering course material is alot like getting the body to do what you want thru muscle memory. The only difference is training the brain to do the same thing. If you practice something correctly over and over it becomes familier. You can train the brain to do work the same way. If someone says they hate math it's probably because they weren't taught math properly. You just need to find a way to make it easy and show how the results will help them. Money always gets their attention. I also use money when teaching students how to read a micrometer.