drum (something) into (someone's) head
To educate someone of something through intense and frequent repetition. The teacher tried drumming the material into their heads before the statewide exam, but he was still concerned they weren't getting it. You never listen to what I'm telling you! Do I have to drum it into your head, or what?
drum something into someone
and drum something into someone's head; drum something inFig. to teach someone something intensely. Her mother had drummed good manners into her. She drummed in good manners day after day.