Source: Presented by: Sarah Carlson - Educational Consultant
Source: Created by Sarah Carlson
Source: You Tube
Source: You Tube
Source: YouTube.com
Source: National Council of Teachers for Mathematics Research Brief- 2007
Source: Generating meaning,LouAnn H. Lovin, Joey Mason, and Erin Shifflett, November 2009 • teaching children mathematics, NCTM