My son started seeing a psychiatrist at age 6. That is when he started medications. As far as school goes, does your son have an IEP? If so, there should be a re-evaluation date on the IEP. Also, you should be having yearly IEP meetings to review the current IEP. If he doesn't have an IEP and you feel his edcuation is being compromised by a disability of some kind, you have the right to ask the school to evaluate him. As far as when does the school step in? That depends on the school. It varies so much.