Whenever my autistic student is able to answer a question correctly, I feel very happy for him. But his attention span is short, after an hour of lesson, he will start to lose his patience and starts to stamp his feet and vent his anger. But luckily I am able to handle it and won't feel frustrated. But I try not to be too lenient with him, as I am soft tempered so sometimes it is not good for him. I will try to be strict with him when there is such a need. It is good for him.