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Contents contributed and discussions participated by Chris Harrow

Chris Harrow

"Hong Kong Elementary School Admissions Test Question #21″ - chinaSMACK - 0 views

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    Some of the comments are crass, but the problem is funny. I'm on the fence as to whether this is clever or a "trick" question...
Chris Harrow

Fields Medal mathematics prize won by woman for first time in its history | Science | t... - 1 views

  • She describes the language of maths as full of "beauty and elegance".
  • She did poorly at maths for several years at school because she was not interested in the subject. "I can see that without being excited, mathematics can look pointless and cold. The beauty of mathematics only shows itself to more patient followers,"
Chris Harrow

5 Things You Need To Know About The Future Of Math - 2 views

  • Believe it or not, math is changing. Or at least the way we use math in the context of our daily lives is changing. The way you learned math will not prepare your children with the mathematical skills they need in the 21st Century.
  • Math education is stuck in the 19th Century
  • Numbers and variables are NOT the foundation of math.
Chris Harrow

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

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    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?
Chris Harrow

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

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

Under the SymmeTree - 2 views

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    The Venus-Earth orbit is surprisingly beautiful. The others are gorgeous speculation.
Chris Harrow

Pick's Theorem (with holes!) - 0 views

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    Proof by Kyle Schultz Particularly nice is the end of the page where Kyle incorporates holes into Pick's Theorem.
Chris Harrow

Free Scenario: Capture the Flag! #wcydwt :: Problems of the Week Blog - 1 views

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    Brilliant problem for calculus or geometry. This reminds me of a "Slice It" app problem.
Chris Harrow

Free Scenario: Subway Tokens #wcydwt :: Problems of the Week Blog - 0 views

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    Very funny (& true) first comment. I wonder about making this a much more open ended problem. What if you were told that Samantha inserted $20 and got $2.60 in change? What if she inserted $20 and got 12 tokens? What if she got 12 tokens and $2.60 in change, but you weren't told what she inserted? What would these discussions look like?
Chris Harrow

The Common Core makes simple math more complicated. Here's why. - Vox - 0 views

  • "Numbers aren't these brittle, fragile things that break," Meyer says. "They can play with them in fun, flexible ways."
Chris Harrow

MathGifs: The Traveling Salesman - 0 views

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    Wondering if we can make this a math club problem? Provide a spreadsheet of capital-to-capital distances and ask students to design a "best" path. This is a very famous and very difficult problem. It would connect into the scaling problem we had with the planets in the fall & the US map optimization. Also plays well into the underlying "strategy" conversations we've been having.
Chris Harrow

2584 Fibonacci - Play at CrazyGames.com - 0 views

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    Great Fibonacci Puzzle game
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