Follow the strands of history with these unique teaching aids. A pictorial history of the United States is depicted from the years 20,000 B.C. through 1682 A.D. Colorfully illustrated with precise detail, the reverse side includes reproducible activity cards for extending classroom activities. Each card comes perforated through the center so that it can be pulled apart to create an extra long (6" x 68" ) continuous timeline for your classroom wall or bulletin board. For grades 4-6.