Frustrated by 15 year olds bad school attitude

[Guest guest]

I have a 15 year old son who never wanted to do his homework. Now he seems to be

having an attitude in school as well about not caring if his work during class

is done or not. When I question him about it he says " What are those teachers

talking about, I handed it in. " He is one to always blame others for his

behavior, example the teacher is a jerk. I would love to put him in a school for

AS/ADD kids but costs are outrageous. Any ideas or suggestions for motivating

him? When I take things away from him his behavior just gets worse. Rewards

don't seem to help much either. Help.