Guidebook and abacus (measures 5.37 x 3.25 x 0.75 inches)
The Expanded Beginner's Abacus introduces visually impaired students to early math concepts and number operations, as well as abacus terminology. It supports concepts and skills such as one-to-one correspondence, number meaning, addition, and subtraction. It also lends itself to preparing a young student for the Cranmer Abacus.
The abacus consists of a black frame with 3 rods. Each rod has 9 white beads that slide against a red felt backing. The red felt background provides a sharp visual contrast and prevents beads from slipping.