"I expect to see a great deal more effort for this weeks essay on the various varieties of venom antidotes, or I shall have to start handing out detentions to those dunces who get a 'D.'"
-- Severus Snape (OP15)
Schoolwork assigned to be completed outside of class time.
McGonagall used her classroom's blackboard to provide homework questions and instructions (GF22).
Miranda Goshawk used the Bat-Bogey Hex on her sister Tangwystl when she wanted to quiet her so she could do her homework. (BoS)