I'll talk about my general khan academy experience in the past 2> yrs. have been an avid user since the age of like 7 or earlier (it's a dream to meet Sal Khan:star-struck:). 

i mostly use it for SAT prep now and they had a really nice system in place, but collegeboard and KA did something new i think so that's changed. haven't been studying for some time oops but I like how clear they make their new releases/updates to follow. Khan Academy's documentation is always top-tier. good engineering fs.

-- aneka mulgund 

it would be a dream to have some of your time sal! if you're ever free please linkedin message me and we could hop on call. www.linkedin.com/in/aneka-mulgund-6b34991b7