Quilters have been practicing geometric principles for centuries. Since straight seams are easier to sew than curved ones, the grid naturally evolved as the basis for their designs. This book is a resource for experimenting with traditional patchwork quilt patterns. It provides students a hands-on understanding of geometric concepts. It contains grids for reproducing traditional patterns or creating original designs, an index of quilt patches, and a selection of patchwork patterns. The first section, "Grids," includes basic grids and special grids for the four most common quilt patterns: four patch, five patch, seven patch, or nine patch. The second section, "Visual Index," provides a visual reference of nearly 300 traditional patch or block designs. The final two sections provide students with opportunities to experiment with color and design. In section three, "Classic Symmetrical Designs," a single block altered by horizontal or vertical manipulation results in 16 varied patterns. In the last section, "Designs With Variations," a block, rotated 90 degrees, reflected, or staggered, creates pattern variations. Suggestions for student activities are included. (MM)