Get skill-building math practice PLUS a calculator, all in one affordable priced unit that really makes math easy and fun! Students of all ages can improve at their own pace with a timed, no-fail game strategy that makes MathShark great for individual, self-directed time testing. MathShark randomly or sequentially drills essential math skills including addition, subtraction, multiplication, division, fractions, decimals, and percents with 8 levels of difficulty for each basic operation. The LCD screen displays problems both horizontally and vertically. Lights and tones provide non-stop feed back to build learning confidence. (Sound can be turned off for silent classroom operation). For grades 1 to adult.