My DS is 3 and started preschool a couple of months ago. He flaps his hands when he's excited, and the teacher is now telling me that she's noticed some repetitive behavior, such as repeating words unnecessarily, or needing to do things in a certain sequence before being able to move on. My DS is a high energy child, very sociable, does not display any other signs of what could be autism. However, the teacher seems concerned and so am I. Could anyone share a similar experience? I would like to know for instance if a child in the autism spectrum can still go to mainstream school (with maybe some extra help at home), or will need special needs school.