Khan used to have something called "world of math", which would take you through the entirety of Khan academy "backwards". Eg., you would do problems, and only take lessons when you couldn't complete a problem.
While the first 1 or 2 weeks felt more like a case study on how to teach number literacy to children ("how many elephants are there in the picture?") it soon became real calculations and later on all the branches of math. I did it for a few month leading up to my masters, and it was great.
While the first 1 or 2 weeks felt more like a case study on how to teach number literacy to children ("how many elephants are there in the picture?") it soon became real calculations and later on all the branches of math. I did it for a few month leading up to my masters, and it was great.