2 players face each other across a table with a small candy on the table between them. The teacher reads anything off the card and the one to slap the candy first (and proceed to give the correct answer) keeps the candy.
As a bonus, they get an extra 2 candies if they can quote the SM.
The winner then takes his candy and sits down and another player comes up to challenge the loser (that way you don’t have just winners all the time—they can’t sit down until they get one.
Let them use their bookmarks after a few rounds if they need help.)