Koopergarten

Koopergarten is the supposed Koopa equivalent of kindergarten. Not much is known about Koopergarten, although the curriculum probably has to do with educating young Koopas so that they'll grow up to respect their own kind, and learn to despise the Mushroom Kingdom.

Koopergarten was only ever mentioned in Hip and Hop's biography from The Adventures of Super Mario Bros. 3 The Complete Series DVD set. According to the writers bible, the twins flunked Koopergarten.