It is common for people with this disorder to not make eye contact, avoid being touched, repeat movements, or insist on the same routine. Some kids are very active; some are very quiet. They may have trouble learning to dress themselves or use a spoon and fork.
Doctors learn about how a child acts to decide if he/she has autism. There are no medical tests, but doctors may do tests to make sure there are no other health problems.
Since people with autism process information differently, special help in school is needed. But they often stay in regular classrooms, go to college, and have jobs when they get older. Some even write books and articles about their disabilities.