My son is 17 and he has been diagnosed with ADHD with issues about his focus. He forgets things I tell him to do right after I tell him, has a hard time keeping organized, loses things easily, can t remember if he did a task or not. Last week I saw a library book in his backpack and I asked him about it and he said he did not remember getting it. He was given it in English class and was supposed to read the first act and be ready for a test already. Do you think it could be more than just ADHD?
In my opinion yes it is part of ADHD.  Attention enhancing techniques should be practiseddaily an old newspaper , select a letter and then cancel letter 15 mins daily next option would be stimulants as treatment for ADHD