"What Teachers Make"

This was passed on by one of my former teaching colleagues:



This version has clearer audio, but is more subdued. Here's Taylor Mali's webpage and YouTube channel.

I haven't watched all of his stuff yet, but "The Impotence of Proofreading" is great, and seems to owe a debt to Richard Lederer's World According to Student Bloopers.

(There are also those teachers who try too hard to be cool.)