This clear introduction to tessellations and other intriguing geometric designs help students explore polygons, regular polygons and combinations of regular polygons, Escher-type tessellations, Islamic art designs, and tessellating letters. Step-by-step directions for creating tessellations support discussions of the symmetries and transformations involved. The companion book of overhead masters contains more than 270 patterns students can use to create and analyze polygonal, regular, demi-regular, and demi-regular tessellations; star polygons, tessellating curves; and polyominoes. Reproducible. Grades 6-12