I have a 3 ear old autistic child who is speach delayed....?

i bought him a laerning book for ages 2-3 years of age it only has pictures and a few letters for him to try to trace...i tried to get him to point out the pictures i nthe book after i helped him identified what the are....instead he took his penncil and scrribbled all over the book...i took it for mhim upset that he is not tring to focus...but instead he threw a tantrum.. in which i had him go to his room to calm down...how cna i get him to focus enough to do his work book? how can i avoid sending him to his room since his education is important to me autistic or not i wnat the best for him......