Control Freak(Dewey) gets him kicked out of the band
Department of Redundancy Department: Dewey telling the kid's parents what he taught their kids goes something like this: "Math, science, uh.. geography, Latin, Spanish, French, Latin... Did I say math already?"
Also, "It will test your head, and your mind, and your brain."
Everybody Owns A Ford: All the parents' cars are Volvos. Probably done for laughs, not Product Placement, unless Volvo itself has a sense of humor about its stereotypical owners.