Investigations Materials. Similar and Congruent Figures Worksheet. PDF Worksheets. Free Algebra 1 Worksheets. Chess. Cool Math - free online cool math lessons, cool math games & apps, fun math activities, pre-algebra, algebra, precalculus. Free Educational Videos for K-12 Students.

Math Games. Writing in Math. Math Worksheets. National Centre for Excellence in the Teaching of Mathematics - NCETM. Math Playground - Online Math Games that Give your Brain a Workout. Math Worksheets, Tables, Charts and more from HelpingWithMath.com. Elementary and Middle School Mathematics. Create a Graph Classic-NCES Kids' Zone. Cast Your Vote! Welcome to Illuminations. National Library of Virtual Manipulatives.

3D Shapes . Intro. We live in a three-dimensional world.

Every object you can see or touch has three dimensions that can be measured: length, width, and height. The room you are sitting in can be described by these three dimensions. The monitor you're looking at has these three dimensions. Even you can be described by these three dimensions. Math is Fun - Maths Resources. Welcome to A Maths Dictionary for Kids 2011 by Jenny Eather.