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Matt Enlow on Twitter: "A follow-up to my dissection puzzles from last month. Share and... - 0 views

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geometry similarity congruence twitter dissection

shared by Chris Harrow on 20 Jan 16 - No Cached

Dan Meyer on Twitter: "What math class needs is more WTF. http://t.co/IvVIweMghF http:/... - 1 views

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dan meyer wtf reform

shared by Chris Harrow on 08 Jan 15 - No Cached

Twitter / khanacademy: Every triangle is a right ... - 1 views

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Khanacademy right triangle Pythagorean irrational

shared by Chris Harrow on 09 Aug 14 - No Cached

Chris Harrow on 09 Aug 14

This problem isn't remotely unique to Khan, but I'm a bit put off by the "Learn the Skill" call. That said, here are my potential additions: 1) What are the lengths of the hypotenuses? (easy) 2) How many triangles until the hypotenuse length exceeds 5 units? 3) How many triangles until the SUM of hypotenuse lengths exceeds 5 units? (never done this. How would a MS or geometry student attempt?) 4) How many triangles until the figure begins to overlap itself? (never done. How would a MS student attempt?) There must be many other GREAT problems here. Thoughts?

<div class="cArrow"> </div><div class="cContentInner">This problem isn't remotely unique to Khan, but I'm a bit put off by the "Learn the Skill" call. That said, here are my potential additions: 1) What are the lengths of the hypotenuses? (easy) 2) How many triangles until the hypotenuse length exceeds 5 units? 3) How many triangles until the SUM of hypotenuse lengths exceeds 5 units? (never done this. How would a MS or geometry student attempt?) 4) How many triangles until the figure begins to overlap itself? (never done. How would a MS student attempt?) There must be many other GREAT problems here. Thoughts?</div>

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Twitter / jamestanton: Does every power of 76 end ... - 1 views

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tanton exponents Proof

shared by Chris Harrow on 09 Aug 14 - No Cached

Chris Harrow on 09 Aug 14

Once a student understands exponents, this is a brilliant problem to inspire student thinking.... Even if you just do the 2-digit version...

<div class="cArrow"> </div><div class="cContentInner">Once a student understands exponents, this is a brilliant problem to inspire student thinking.... Even if you just do the 2-digit version...</div>

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Rick Racela on Twitter: "Wow, @USATODAY is massive https://t.co/A2wJHopK9S" - 0 views

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statistics graphs misleading USA Today

shared by Chris Harrow on 24 Jan 16 - No Cached

Chris Kunkel on Twitter: What wacky scale is being used in this graphic? #mathchat http... - 2 views

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statistics graphing scaling

shared by Chris Harrow on 30 Aug 14 - No Cached

Chris Harrow on 30 Aug 14

This is pretty bad ... and most would never have noticed.

<div class="cArrow"> </div><div class="cContentInner">This is pretty bad ... and most would never have noticed.</div>

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