Investigating with TesselTiles Author:John Gregory By John Gregory, Graham A. Jones, and Carol A. Thornton. Hands-on mathematical investigations couple the scientific approach with concrete models-TesselTiles shapes-to demonstrate and explain complex mathematical ideas. Colorful geometric TesselTiles form intricate patterns that illustrate symmetry, similarity, area, ratios, and irrational numbe... more »rs. Blackline masters are included. 94 pages. Grades 6?10.« less