This is why video is important. This was AVID Summer Institute years ago. We were developing a lesson for the Monty Hall Problem…Stick or Switch. Just watching this makes me smile as we, math eds, tend to make everything as hard as it possibly can be.
We did not have twitter at the time. I wonder if I am connected to any of these individuals. If I am, tweet me! @rafranzdavis
Btw, here is the Stick or Switch Lesson from NCTM Illuminations
Also, here is the NLVM applet, which does not work on mobile.