This teacher pack includes ten (10) calculators and one (1) blue CASIO branded fabric carrying case. With Natural Textbook Display™, the fx-55 PLUS introduces learners to fractions, division-with-remainder, and random numbers. Natural Textbook Display presents mixed numbers and improper fractions exactly as they appear on paper, and helps students understand the fundamentals of fractional simplification. The fx-55 PLUS expresses the joy of math through a colorful presentation of functions on the keypad.