Here are some of the rough thumbnail storyboards drawn in a little notebook. As you can see, Mr. Wubhamer was intended to be in costume (as Ricky from Trailer Park Boys) in this episode but it ended up being too much extra work since I was trying to get the episode done in time for Halloween.
And here's the full storyboard animatic, drawn in Flash. As you can see 58 seconds in, once I'm done the animatic I start animating directly in the same file. It makes it easier to see if the flow is working right once I'm animating, check hookups and make adjustments to the boards as I go if needed.