The mind is not a vessel to be filled, but a fire to be kindled.

— Plutarch

Looking back to what my math teacher did, she would come to class, give the new material, and then give us the hardest task from the book for this new material. We had to learn how to solve problems rather than what was in the last lesson.

I’ve not been able to reproduce anything like that with my kids. I tried teaching my first kid multiplication (or something similarly complicated) and he ran away by crawling when he was 2 and forgot how to walk.