Men, there’s a little crippled boy sitting in a hospital who wants you to win this game. I know because.. I crippled him myself to inspire you.— Burns
One of the staples of the Simpsons' opening credits is the blackboard gag. Bart writes something on the chalkboard as a punishment, quite often ironic. Here we list them all, including screenshots where useful. Any episodes not listed here do not have blackboard gags.
Season 12 starts 27th September.