It's the name of a certian kind of comedic theatre, which used stock characters and very simple plots, so that the pratfalls, slapstick, puns and jokes could be the focus.
Because there aren't enough hours in the school day.
Because sometimes it's hard to get to technology resources in a public school.
Because some students work better at home, by themselves, or from sources other than me.
Because I want my students to be able to say "But I am studying, Mum!" when they are told to get off the computer.