This handy guide will take abacus users from beginner to master level in a very short time. Though the Japanese abacus may appear mysterious or even primitive,

This is a simple guidebook for people who are interested in learning the introduction of how an Abacus works. The book includes simple explanation of the theory

For centuries, experts have argued that learning was about memorizing information: You're supposed to study facts, dates, and details; burn them into your memor

The fun, engaging program that will help your child master the addition facts once and for all—without spending hours and hours drilling flash cards! Addition

Learn how to add, subtract, multiply, divide and find square roots with this easy to use instruction guide. There are many sample problems with step-by-step ins