The video below was posted by my colleague Jason Ermer, founder of Collaborative Mathematics. From the YouTube description:
A cartoon about the proverbial mathematical “function machine”.
I was part of the creative team of mathematics teachers (including Patty Hill and Michael Word) who created this cartoon. It was originally (and still is) a component of the Honors Algebra 1 curriculum at Kealing Middle School in Austin, Texas.
I take full responsibility for the spelling error. (Can you find it? 🙂