It sounds like your 8-year-old may have an additional learning disability. Has he been evaluated for specific LDs? If he’s really struggling, despite lots of help, I’d ask for an evaluation for dyslexia, dysgraphia/written expression disorder, and possibly dyscalculia (if he’s struggling in math too). It’s time to seek more answers.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism