I need a change

My 13 year old son does not do well in school. Over the years he has mentioned that when he is alone in the hall doing his work or in the office and is doing daily work he enjoys it. He says he can concentrate better. He says he feels he can get more done without all the pressure and distractions. He has ADD. He has mentioned this throughout his elementary years on several occasions. He is now starting Jr High. He is behind in his education. I hate sending him to school almost as much as he hates going. What should I do? Im a single mom. I work full time running my own company. Should I consider some kind of alternative education??