ds is doing AS levels now, he did really well in gcse but is struggling now. he sat his business AS retake today (got a d last time)but he says that he did even worse today as didnt have time to complete exam,he sat the mock last week and got an A ,i think he struggles with the time and pressure factor of exams. He is struggling with maths full stop and says he wishes he had never chosen it. Any tips on how i can help him to revise, or advice that i can give him ?