Marilyn Schreffler

Yogi and Boo Boo usually snooze right through Christmas. (Hibernation, you know.) But this year, happy holiday music rouses them from their sleep and right into the fun.

Scooby-Doo and Shaggy learn there are things even scarier than homework in this feature-length field trip into mystery and mayhem! The academic adventure begins when the boys sign on as gym teachers at Miss Grimwood's School for Ghouls- only to discover the pupils are (zoinks!) daughters of the world's most frightfully famous monsters!