I suggest that you write a letter to the administrator of special education, stating that you believe that your son's current refusal to go to school is a direct consequence of his not having had an appropriate educational program over the years. Ask them to create or find an appropriate program for him now. If your son is upset about his current situation, he may want to write on his own behalf. This makes for a very powerful case, and can make your son feel that he has some control over his future. The school may be able to provide an alternative program in the high school (if it's not a class for students with behavioral or emotional problems), or they may need to find a program outside the school (e.g., a private school or a vocational school with a strong LD program). If the school feels that they have done all they can, and you disagree, you have the right to dispute and challenge their position. You will probably want to contact the division of special education within your state's department of education for assistance in this matter. It may be necessary to engage the services of an attorney who specializes in advocating for the rights of children with special needs.
Son Refusing to Go to School
LD and ADD/ADHD Expert Advice from Jerome J. Schultz, Ph.D.