Don't do khan academy because you have to pay when you want to sign up. But it is free to schools and that's the only thing that's good. And if you want to get untill 100% you have to do itagain. And if you get questions wrong, then you have to do it over again that stresses me out.
Ixl is stupid because i'm in 5th grade an if you get one question wrong, then boom your score goes really down. It is not fair how the score goes down really low and that is your hard work you lose the points and it doesn't really sometimes tell you what you got wrong