Intensive, repetitive behavioral & educational therapy (aba, the denver model) 25-40 hours/wk works best.
A child with autism
won't understand why he should follow your agenda; ignore non-compliance & protests. Say, "sit down. Look at me, " tapping your temple, before teaching. Focus on joint attention, a precursor for communication. Ipad autism apps may be useful, but face -to-face time is best.