The course emphasizes how memory works, you would think that to remember things you have to write the information well-enough in it so it sticks. But in reality, the information has been there the first time around the issue for the brain is finding the information like locating a product in a large warehouse.

It is the process of recall that makes things stick to memory as opposed to repeated memorization. Working on several subjects at a time spaces out sessions and prevents the illusion that you have access to the knowledge you worked for when in fact you don't.