http://illuminations.nctm.org/assets/0/77/77570ffc-98f8-46b5-b4d1-aa8043e88c49.swf - 1 views
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TESOL CALL-IS on 05 Jan 14This is a great resource for teaching math and geometry. Slide the figure's grab points around and you will see how the sizes and math change in 2-dimensional objects. Would be great for whiteboard work.