which of the following should you not do when a student is suffering a tonic-clonic seizure?

When a student is suffering a tonic-clonic seizure, you should NOT hold their shoulders. Holding their shoulders can potentially restrict their movements and may cause injury. Instead, the proper actions include loosening tight neckwear, cushioning their head, turning them on their side after the seizure to help keep airways clear, and removing dangerous objects from around them. It is also important not to put anything in their mouth or try to restrain their movements during the seizure.