Website
National Council of Teachers of Mathematics

The Math Forum: Making Patterns

For Teachers Pre-K - 1st Standards
Explore the literature connections, online activity, pencil and paper activity, and the manipulative investigation of patterns and geometric shapes on this page!
Website
Books in the Classroom

Carol Hurst's Children's Literature Site: Patterns and Picture Books

For Teachers Pre-K - 1st
CarolHurst.com provides a sample chapter from Picturing Math, which teaches geometric concepts using picture books and activities.
Activity
Other

Math Stories: Finding a Pattern

For Students Pre-K - 1st Standards
At this one page site, you can work through step by step a sample problem that illustrates the problem-solving strategy for "identify a pattern." The answer is right there to help you check your thinking.