Tom Scavo's Tangrams A unit for grades 4-6 using tangrams to compute the area of polygons without formulas. http: //mathforum.org/trscavo/tangrams/contents.htm...
Math Forum: The Coordinate Plane (Chameleon Graphing) Sam the chameleon introduces graphing points on the numberline and the coordinate plane, for elementary and middle-school students. http: //mathforum.org/cgraph/cplane/
What is Area? Learn that the area of a rectangle can be found by counting the number of squares http: //mathforum.org/alejandre/frisbie/one.inch.ti...
