APUSH Course feedback

Hi Khan community!

I'm currently using the AP U.S History course here to study for my upcoming exam, and have mostly loved the content. However, it EXTREMELY frustrates me that the content isn't in chronological order (i.e skips presidential terms, and comes back later) and it makes it extremely confusing for me to keep everything straight in my head. Another thing is that I notice that after periods 1-3 there are little to no more quizzes and tests! How am I to test my knowledge and keep track of what I know and need to review?

Lastly, I feel that there should be a diagnostic test, 55 MC, writing portions and all. 

I know that Khan Academy is always working towards improvements, so hopefully, somethings can be changed