Aren't we all glad we don't have a teacher like this! I named him Mr. Hidden since he's a ninja!
Anyway, got the class using the Humorous Fantasy Class Generator from Seventh Sanctum ->[link]
Got it on my first try. Anyways, I thought it'd be fun to give this a shot.
Drawn by hand
Inked and Colored in Photoshop 7.0
About 2 hours of work