Following this topic, because I just had a very similar conversation with my DS8's French teacher. My DS has DCD/dyspraxia with accommodations in place for it.

She was asking me for suggestions on engaging DS in the class so that he will stop wandering around, talking to his friends, singing, and not doing his work. I had to admit - I have no idea! She said that he understands the French, can speak it really well when he wants to, but since he refuses more often than not, she can't really assess him.

She is trying, but there is only so many times she can prompt him to be on task when she is dealing with a class of 20 students.