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Touring KenKen
KenKen puzzles caught my attention recently while I was browsing through Marilyn Burns’ blog post. Right away I was able to…
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16 Misconceptions
I wrote these 16 images of common misconceptions before the September 17, 2015 #elemmathchat about “Mathematical Misconceptions.” If you would…
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NYABS Part 3: Number Trading
It’s possible you’ll feel that Number Trading is more like Leveling Off or that it is more like Passing Out.…
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NYABS Part 2: Passing Out
While you’ll initially see the Passing Out strategy, ultimately you will find yourself looking at two strategy icons which will…
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NYABS Part 1: Leveling Off
When you begin watching the video you may agree that this is not your average blog series. Or maybe, it…
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5 × 9 Is More Than 45
Even though some students and teachers will chase multiplication facts, such as 5 x 9 = 45, in pursuit of…
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The Lattice Discussion
I put this together very, very quickly in response to a discussion that included questions about lattice multiplication. You’ll see…
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These Dots Will Grow On You
Nearing the end of the Subitizing Series, I wanted to take time to detail a single math question, while placing…
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Beyond Subitizing
In this 4th post in the Subitizing Series I’ll use 4 simple dots to illustrate what happens when we provide…
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