I'm in my 20's and I also have autism ,School wasn't much of a help for me ,I also have issues comprehending some of the questions you get in homework time limits etc which causes me to answer wrong, I never really had a tutor to help me out but since finding Khan I now can go my own pace to figure out the rough spots and it has helped so far , I'm doing Khan as an adult learner I'm working myself up from 2nd grade on to brush myself up as I go higher on here due to I notice I struggle in some 2nd grade parts but do fine in some college parts I'm unsure what my set grade would be so thats thats another reason why I'm starting at 2nd grade on up ,for anyone feeling discouraged on whatever grade you start at math go one grade or so down and work it up it don't hurt I feel it sharpens the mind, I can't wait tell I get to the higher grades and able to do them with no brain blocks I get :) thank you again