![timdoner_ted_polyglot](http://blog.ed.ted.com/wp-content/uploads/2015/04/timdoner_ted_polyglot-565x338.jpg)
Last week’s challenge was all about social studies videos. Here’s a list of some of TED-Ed’s favorite math videos. Flip them!
The challenge: Over the next week, flip one (or all) of the following videos, nominate your flip as a Best Flip, and we’ll potentially feature it on the TED-Ed website!