No surprise, probably, that Coach was my favorite cast member.
Over at Ken Levine's blog, we find this information about the episode from script writer Tom Reeder:
Hi, Ken --
As it turns out, I was the writer of that script. It was called "Teacher's Pet", and the storyline had to do with Sam going to night school to get the high school diploma he'd never achieved. Inspired by Sam, Coach also went back to finish up -- he was a couple of years short. Coach proved to be a more diligent student than Sam, because he developed his own unique mnemonic devices. One of them was a song (to the tune of "When The Saints Go Marching In") that contained facts about Albania for an upcoming Geography test: "You border on the Adriatic"... "your land is mostly mountainous"... "and your chief export is chrome".
In fairness, I think Sam Simon may have supplied some of the words for the song, and I may not have the lyrics exactly right, but I'm pretty certain "your chief export is chrome" was the last line. Nick Colasanto really sold it. It was pretty funny.