by Joan A. Cotter, Ph.D.

In Level B, the child learns the addition facts and adds numbers in the thousands. He learns the addition facts with strategies and learns to add 4-digit numbers. Subtraction is delayed until addition is thoroughly understood. Geometry, money, unit fractions, and other math related topics are also introduced. Level B can be implemented without Level A. Level B Worksheets are needed for the child.

Manipulatives for Level B may be purchased as a set (includes those needed to complete Levels A to E) or separately at www.alabacus.com.

Required Manipulatives: Al Abacus Standard, Place Value Cards, Base 10 Picture Cards, Abacus Tiles, Cards (6 special decks needed for games), Geoboards, Wooden Cubes, Colored Tiles, 4” Geared Clock, Math Balance (Invicta), Tally Sticks, and Yellow is the Sun CD.