My favorite resource for Math activities that relate to quilting is TexTile Math by Betsy Franco and published by Creative Publications. There are also posters of quilt patterns of Colonial America, Amish, Navajo, Hmong from Thailand, Maya from Guatemala, Maroi from New Zealand, and Africa that go along with the book. "TexTile Math is a series of open-ended challenges for students in kindergarten through grade 3. By solving questions related to beautiful textile designs featured on the posters and in the book, students explore geometry, numbers, area, fractions, logic, and discrete mathematics. The multicultural themes throughout the book give the math concepts greater relevance and depth." ("To The Teacher" Page iv, TexTile Math)

Students are given the historical background behind each of the patterns presented. Then they can use one inch grid paper to copy quilt designs and learn about different mathematical concepts used in quilts. For example the Log Cabin design is used to teach fractions. Students are expected to color 1/9 red, 3/9 green, and 5/9 purple as they color in a 9 patch Log Cabin Design. Children are encouraged to see how many lines of symmetry they can find in a colonial American star design.

http://www.tenthplanet.com/Teachers/ This resource offers suggestions for using quilts in the teaching of Math Skills.