The Introduction to Decimnal System is a concrete representation of the decimal system from 1 to 1000. This set includes 9 units, 9 ten bead bars, 9 - 100 squares and a golden bead 1000 cube. Set...
The Introduction to Quantity materials consists of a single golden bead (with a tray to keep it from rolling away), a bar of 10, a square of 100 and a cube of 1000. Includes wooden storage/display...