DH is a private guitar teacher. He has recently taken on a pupil with Aspergers. Between us we know nothing about any form of ASD. His parents have said that he is really enjoying his lessons but DH wants to do his absolute best for him, but at the same time wants to be realistic about what to expect from him in terms of progress. So far he has tried to be fairly direct and precise in his instruction and has realised that his "jokes" don't go down to well so has tried to curb them! He has a good relationship with the parents but they have just said that they have no particular expectations and are just pleased that their son is doing something he enjoys.
I understand that you may get back to me and say, "can't help, everyone is different" but I hope you don't mind me asking for any tips/insight into how people with this condition learn and develop.