I had a student this past 9 weeks at the end of the school year, who had a LOT of anxiety about the simplest of art activities, would hang in the classroom after all were dismissed, pondering his work, even sending other teachers to talk to me about what he had done in class! Never happened before in all my 23 years of teaching. He is also very socially ostracized and sits by himself.

So, then at the end of the school year, I attended a workshop on Aspergers, and one of his basic skills teachers was sitting next to me, and said, "You know, E*** has Aspergers syndrome. I had no idea, and I wish the school psychologist has informed me. All the traits fit him to a tee.
Next year, I'll be better prepared for him. Such a sweet boy, and I have compassion for his behaviors now.

Some of the things I remember mentioned by the specialists who conducted the workshop, were obsession with perfection, difficulty dealing with minor changes in schedule, personnel,etc., anxiety. Does any of this sound familiar to any of you?