## Great Classroom Action

February 27th, 2013 by Dan Meyer

**Cathy Yenca** offers her student “two sheets of paper, some tape, a ruler, a calculator, and a little bit of breathing room” and the two of them make math happen:

Clearly, the student was delighted that his calculations matched what happened in the video. I said to him, “E., so you learned a little something about volume today, eh?” His response, without hesitation: “Always go with the fat one.”

**Rachel Kernodle** posts a clever illustration of inverse functions.

**Sam Shah** shares his struggle to make related rates interesting and finds some solutions:

Then I asked our esteemed volunteer to use one breath to blow up the first balloon. Taped it up. Again, for two breaths. Taped. Et cetera until we got a total of six balloons taped. Then I asked what things are measurable in the balloons. Bam. List.

**Bruce Ferrington** asks, “How Tall Is Our Class?” a question which is surprisingly involved:

So, how were we going to measure the height of a class? Well, the kids came up with three suggestions.

on 27 Feb 2013 at 8:50 am1 Hooks for Inverse Functions | mathcoachblog[…] browsing through Dan Meyer’s most recent post on great classroom action, I found a link to a picture which put a smile on my face, from the blog Your Poisonous […]