Help! I am a mum of three 16,14, and 12. My 16 year old is facing gcse's and is behind in his work at school. We had a school meeting and a plan of only half an hour a night revision was discussed and agreed. He hasn't done any, he gets abusive towards me when i question his not revising. I am so worried as he wants to go on to sixth form. i have tried positive rewards, trying to talk to him like an adult, spelling it out as it is, loosing my temper, contacting the school for advice none of which is working. The worst part is the lying to me. We had a close relationship before this, I feel like I'm loosing him. Any ideas? Thank you all