Coin Combinations


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Consider: What do you notice? My first observations included, “Hey! Sodas cost $1.50.” What do you wonder? The first thing I wondered was, “How many coin combos are possible?” And immediately after that, “Are pennies allowed?” (Check the picture for the answer.) And with my teacher hat on… “What strategies would other students and teachers use to answer the “how many combos” question? Sequel …


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Tesla Model 3


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I’m fascinated by the pre-order hype surrounding Tesla’s latest car, the Model 3. Model 3 design sketches pic.twitter.com/P5ucOBRUZ7 — Elon Musk (@elonmusk) April 3, 2016 With a little help from Skitch, let’s turn this scenario into a math problem. Throw that image on the screen and ask students: How many orders in 24 hours? What info would help you figure that out? Ideally, after making some predictions (and …

Visual Patterns… Now What?!


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If the response to my post from Tuesday is any indication, people on the Internet Machine love Fawn Nguyen’s Visual Patterns. Let’s say you’re one of these folks, and your students are now rocking this sweet set of challenges. Now what?! Well, for one thing, don’t stop! These are rich enough problems to keep bringing them before your students. (In fact, the real fun begins when …

Closer to One


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Earlier this evening I was poking around map.mathshell.org looking for bite-sized middle school tasks. I found a limited but great set of questions here and was inspired to ask this: Which is closer to 1? Does it depend on n? Explain. (n-1)/n or n/(n-1) Inspired by Q2 on this: http://t.co/zUp670WyqS — Michael Fenton (@mjfenton) April 23, 2014 Just in case Twitter messes up the formatting …

Complete the Quadrilateral Domino Activity


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I’m teaching a geometry course at FPU this semester. I taught the same course three years ago, but my philosophy and practice have shifted so significantly in that span that I’ve scrapped what I used the first time around and am in full create-and-curate mode. With that in mind, I’ve been frequenting Geoff Krall’s fantastic curriculum maps rather, um, frequently as of late. …

Rich Math Tasks

Thursday evening I asked Frank Noschese (@fnoschese) and Elizabeth (@cheesemonkeysf) a question about whether they thought there was any value in students using a reductive, drill-and-kill math practice exercise platform, provided that it was accompanied by rich tasks and assessments in a classroom that demands synthesis and critical thinking, and provides students with opportunities to develop mathematical habits of mind. I …