Thankfully after a 3 episode absence, the chalkboard gags return. "I will not bite the hand that feeds the Butterfingers." My assumption is Nestle wasn't exactly pleased with the slam on Butterfinger in "Sweets and Sour Marge" (Wiggum: "Heh, even the fire doesn't want them.")
DYN...
... this was the first appearance of the medium length opening sequence (cut from band practice to the driveway) since "The Wizard of Evergreen Terrace" (5F21)? ... Kirk and LuAnne Van Houten were dancing together at the phony prom?? ... the drummer in the band at the prom looked an awful lot like Otto?