Eight minutes before the bell rings?*
Lest your older students are feeling too cool for paper snowflakes, this latest from Vi Hart is for them.
Plunk down a stack of paper and a pile of scissors.
Start the video.
Tell everyone to keep up and produce at least one snowflake by the end.
*Eight minutes, because scissors, paper, and eyeballs will be jumping all over the place trying to keep up, so you might as well plan to show this twice.
[Vi Hart, professional mathemusician at the Khan Academy]