Ho Ho Homework

"It's almost Christmas, and Jack's classroom has a new substitute teacher. There's something funny about Mr. Clausen--he seems awfully familiar.... Is it his long, white beard? Is it the way his laugh sounds a lot like "ho, ho, ho"? Or maybe it's his snack of milk and cookies--reindeer-shaped cookies! Jack's classmates are convinced they know who Mr. Clausen really is, but Jack's not so sure"--