I'm headed back to school again this fall at the ripe old age of 30 and I'm discovering that my memory isn't what it used to be (not that it was spectacular to begin with)! It may have less to do with age, and more to do with a chronic illness that I suffered from in my late 20s that I have recovered from with treatment and physical therapy - so I'm hoping that the deficits may perhaps be temporary. In any event, I'm wondering if anyone has any tips for improving memory function, particularly for math and science topics? For instance, in physics, I feel it's important to remember the derivations of various important principles like the wave equation and Kepler's laws, for example. However, usually after a day or two from refreshing my memory on some topic, I find I can only remember bits and pieces of it and it starts to slip away. Does anyone has any particular exercises or methods that you to improve retention?