The PRIMARY CALCULATOR SET OF 10 is a must have for your math manipulatives classroom collection! Give each student a primary calculator or have them work in pairs or groupsl Start teaching calculator skills early with the appealing Primary Calculator. This bright blue calculator is both solar and battery powered (includes 1 AA battery). Students can start with basic math operations and work their way up to more advanced concepts such as percents and square roots. Perfect for independent math practice. Features Include: - 4-function - Three key memory - Auto shut-off - 8-digit display Measures 21/2in. x 41/2in. Ages 3+. The PRIMARY CALCULATOR SET OF 10 is priced right and will be a huge asset to teaching students how to use the calculator as well as check their work.