This is just a repost that answers several frequently asked questions:
(1) How do you help your students review for a major cumulative exam?
(2) Why does your email say "Nacho Man?"
The point is, extra credit and food provide significant incentive to bring students into the classroom during what otherwise would be wasted independent study time. Once students are in the classroom working diligently on physics questions, learning is happening even if music, conversation, and nachos are happening simultaneously.
Check out this post.
Peter Chen, a student who is well-versed in video production, intends to create a "cooking show" style clip about Nacho Day in our physics department. I'll post the link in a month or so.