Texas Instruments TI-15 Explorer Elementary Calculator - Auto Power Off Dual Power Plastic Key Impact Resistant Cover - 2 Line(s) - 11 Digits - Battery/Solar Powered - 6.9 x 3.5 x 0.7 - Blue - 1 Each TI-15 Explorer Elementary Calculator encourages students in grades third through sixth to develop their problem-solving skills and begin connecting mathematic concepts. Displaying two forms of fractional results simultaneously allows students to begin making crucial mathematic connections. They can simplify fractions to lowest terms automatically or step by step. Calculator converts improper fractions fractions mixed numbers decimals and percent and perform operations in M-D-A-S order. Built-in flash cards challenge their addition subtraction multiplication and division skills. Set the flash cards for the appropriate age and type of operation. The flash card functionality gives students hints when a wrong answer is entered and includes an internal scoreboard enabling teachers to check each student s progress. Design includes an impact-resistant cover; hard plastic color-coded keys; two-line display with 11 digits per line and dual power source (battery and solar).