CMC South 2014 Recap: The Sessions

Last weekend turned out to be one of my favorite weekends of my teaching career. I haven’t exactly been at this for decades, but 11 years is no short span either. The weekend was that enjoyable, at least for me. If I’m going to do any justice to the recap, I’ll need to split it into two parts. So much …

The (New) Running Game


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Background A little over a year ago I created a set of Nike+ Running-themed proportional reasoning challenges for my middle school students. The idea originated as a failed attempt at a Three Act task, and eventually turned in to a somewhat-useful website (proportionplay.com). You can read more about the project here. Even after using these problems occasionally throughout last year, and also in various teacher workshop …

Our New Set Game Routine


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For years I’ve used the Set Game to grab students’ attention at the start of class—in a playful, mind-sharpening way. (As an aside, I’ve often wondered whether I should have some sort of bell-work-problem-set-something-or-other, but I’ve never moved even an inch on that wondering… at least not thus far.) A while back I wrote about how this lovely game ventured from my childhood and …

Noticing and Wondering with Trigonometric Identities


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Friday I had a sub Friday in Precalculus. My students were set to take a group of mini-assessments for Chapter 3. I expected they would have some additional time at the end of class, so (out of love for the substitute, and a desire not to waste class time) I wanted to launch Chapter 4 with an exploratory activity. I think it has …

Desmos and the Diagonal


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This morning I ran across an entertaining tweet from someone with a sweet first name: Took an old rectangle/diagonal problem and made an interactive on Desmos https://t.co/P0ZdpSAvSI #mathchat — Mike (@mikekaechele) October 8, 2014 I was reminded of Dan Meyer’s treatment of this problem, and began wondering about adding shading to Mike’s work in Desmos. In between meetings today at school …