My story begins back in nineteen-dickity-two. We had to say ‘dickity’ cause the kaiser had stolen our word ‘twenty’. I chased that rascal to get it back, but gave up after dickity-six miles.— Grampa
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.