For two smart people Brother and Sister are real dummies, so they're going back to their school days, but first Sister goes to church - doesn't find God but leaves with a Pepsi and a beef patty so it worked out pretty well.
Stories of teachers losing control of the classroom, the teacher they both loved inspite of him being a "playful tyrant", Allison ending up in the Nerd Herd, and Jon getting assaulted by a teacher - this episode might fill in a few blanks about why these two aren't scholars. Although Brother has a post-secondary diploma and Sister doesn't, and he wants to make that clear.
