Grade 1 & up. Practice math facts anywhere with this engaging handheld game. Quizzes students on addition, subtraction, multiplication, division, fractions, decimals and percents, either randomly or sequentially, Features 8 skill levels in each category to keep students challenged. Switches to full-function calculator mode with the touch of a button. Provides instant feedback with lights and sound, and allows students to view equations both horizontally and vertically on the LCD screen. Has a silent mode for quiet classroom practice. Requires 2 AA batteries (not included).