It have been 2 years i can't concentrate with teacher in class and complete homework at house. a little homework takes forever!what is the problem?

Talk to your : Primary care physician to r/o attention deficit disorder. They will give you a questionnaire and a history and physical. There is a specific criteria from the american psychiatric association for the diagnosis. A good primary care doctor could do the initial screening and even start treatment if necessary. There is treatment for adhd. Good luck.