It is absolutely punishing him for having a disability — which is neither fair nor acceptable.
I would request that the school evaluate him for a 504 Plan or IEP. Use this sample letter:
Then, when attending meetings about this, make sure they add accommodations for his participation in everything. I would put what you describe here in that request letter above.
If he’s on medication and still extremely hyperactive, talk with the prescribing doc about it. That often signals that the medication is not as effective as it should be. Yes, it’s just one tool, but it should improve hyperactivity.
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism