Learning With Desirable Difficulties

If you make use of desirable difficulties, what you're doing is your strengthening the memory trace in your long term memory. And it's something that's so easy for a teacher to do, because it doesn't take extra time or money but at least trough a lot of extra learning. So those are things like a the testing effectat we call now the testing effect, or what we space practice, or interleaving, or those types of things. Those are desirable difficulties. You can say maybe it even a adds a little bit of cognitive load to the learning process. But it's cognitive load that leads to learning, and not cognitive load that's worthless for learning.