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.
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.