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Building a better shapes book | Talking Math with Your Kids - 2 views

talkingmathwithkids.com/...building-a-better-shapes-book shapes children
shared by Chris Harrow on 09 Jan 15 - No Cached
bmalin liked it
  • Chris Harrow on 09 Jan 15
     
    Brilliant! Share with EVERY child!!!
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Plaited Origami Polyhedra - 0 views

nrich.maths.org/6806 origami
shared by bmalin on 12 Jan 15 - No Cached
  • bmalin on 12 Jan 15
     
    More ideas for origami!
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https://dl.dropboxusercontent.com/u/47041687/Which%20One%20Doesnt%20Belong.pdf - 0 views

dl.dropboxusercontent.com/...ch%20One%20Doesnt%20Belong.pdf danielson shapes book shapes pdf
shared by Chris Harrow on 12 Jan 15 - No Cached
  • Chris Harrow on 12 Jan 15
     
    The BEST shapes book EVER
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Five Triangles: 42. Hyperbola - 0 views

fivetriangles.blogspot.com/...42-hyperbola.html pedagogy problem solving
shared by Chris Harrow on 13 Dec 14 - No Cached
  • Chris Harrow on 13 Dec 14
     
    Read the 2 comments at the bottom of the post. Brilliant and spot-on 2nd comment.
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Magic Square -- from Wolfram MathWorld - 0 views

mathworld.wolfram.com/MagicSquare.html Proof uniqueness
shared by Chris Harrow on 12 Nov 14 - Cached
  • Chris Harrow on 12 Nov 14
     
    Number of unique magic squares. >There is (1) 1x1 square--duh. >Interesting that there are (0) 2x2 squares.  Place any number in any corner--both adjacent corners must be the same number, preventing a square.   Can a 5th grader follow this?  >There is (1) 3x3 square. Can be reasoned out by cases. Can 5th grader follow? >There are (880) unique 4x4 squares. Very interesting that this number jumps so quickly. >Stunning:  There are (275,305,224) unique 5x5 squares.  WOW! >>We don't know how many 6x6 squares there are.  
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