I recently went to DS' consultation evening, and I was told by one of his teacher's that he was not completing the work they set him. I told said teacher that if it has not been set specifically by the teacher has homework, then it is up to DS whether or not the work is useful to him.
I should add that DS is naturally quite intelligent (A*s in all the A Levels he took) and has always taken responsibility for his own work. What should I do?