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Activity
National Council of Teachers of Mathematics

The Math Forum: Exploring Pascal's Triangle

For Students K - 1st
Every grade level can learn from Pascal's Triangle, and this site helps make it possible. There are explanations, examples, exercises and printable worksheets available.
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Activity
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Expanding Binomials and Pascal's Triangle

For Students 9th - 10th Standards
This Math Forum site explains how expanding binomials relates to Pascal's Triangle.