Instead of speaking as a way of communicating, Otto uses sign language and picture exchanges to communicate. At lunch, he uses pictures to show what food he wants to eat.
Otto won't directly ask to play with you when he sees what you're doing looks like fun. He might interrupt what you're doing which is his way of asking to play with you.
What is easy for you to focus on may not be easy for Otto. Other things in the classroom might catch his attention, but this does not make him any less of a student. There are times when he will do the same activity but in a different way.
As Otto's teacher, I will work with other people like doctors, occupational therapists, and his parents to decide what is best for Otto.
If you've met one person with ASD, then you've met one person with ASD.