every male child has ADD according to schools

My son is a Junior in high school and he is not doing well academically. He was not hyperactive as a small child so we never suspected that he had ADD but he has never done well in school and this year his guidance counselor suggested we get him tested for ADD without hyperactivity and he did have this. This really explained a lot about his behaviors and helped us not feel so frustrated with him for his inability to organize his life at all. His guidance counselor has suggested we get in touch with a local therapist who she says has helped other students quite a lot. The therapist uses Neuro-Linguistic Programming. This type of therapy sounds very strange to me. Do you think it is worthwhile for a teenager with ADD?