Thank god I found one clip with all the relevant sequences from Back to School! This is so much fun. Long story short, Rodney Dangerfield plays a very rough and dirty blue collar-type who became a successful businessman with a men's clothing store that caters to tall and husky men.
After his son takes off for college, Rodney's character decides to get his own bachelor's degree, too. However, pop is more interested in partying and paying others to do his work - even in the English Lit course whose teacher, play by Sally Kellerman, is his potential love interest. Here's what happens when Rodney's part tries to game the system:
I may not want to see BtS ever again - god, it was cheesy - but I truly love that scene.