Casio FX-260Solarll Scientific Calculator is perfect for elementary and junior Highschool students. It has a 10-Digit Display with 144 Built-in math functions. This scientific calculator is recommended for General Math, Pre-Algebra, Algebra 1 and 11, Trigonometry, Statistics and General Science. It is approved for SAT, ACT, AP, PSAT/NMSQT tests. Includes a Slide-on Hard Case and is solar powered with battery backup.