Pasta Circle

Fun lesson involving estimation, circles and pasta!

Full lesson: http://reasonandwonder.com/pasta-circle/

Found at: http://reasonandwonder.com/

Bullets and Math

Found this on reddit: http://www.reddit.com/tb/23m702

I am wondering how many bullets on in this photo and think there might be a lesson in it.  I might never use the lesson (not sure that I am comfortable estimating something like bullets), but it certainly presents an interesting question. 

So I posted it onto 101 questions. See what other people are asking.