Khanacademy coursse reccamondation

I wish that Khan academy had a course reccamender built into the website You would put your grade into it and answer a 15 question quiz. ONce your done you will be taken to a page with one math, Social studies, science, computing, art, and reading course reccamened. You can click a button to make all of them your courses or just 1 or 2. 

The quiz will be adaptable so that if you get a quesiton right it will give you a harder question, but If you get it wrong you will get an easier question. The quiz will also have mutiple subjcets in it