These claymation videos (posted over on Division by Zero) by Dave Richeson are absolutely fantastic!

First, Tying the Knot.

Second, Through one hole or two?

Whether you teach topology or not, you (and your students) should be able to appreciate these demonstrations. I hope there will be more coming!

Possibly Related Posts:

• Math about the Electoral College
• A reason to calculate the vertex
• Nature by Numbers
• David McCandless: Data Detective
• My Interview at Wolfram Alpha HomeworkDay