For secondary school. The large display allows fractions, roots, and formulas to be entered in the same order that students write them in their notebooks, and it also presents them in a format that resembles a textbook. The display can be switched from WriteView mode to line mode, similar to standard calculators. With the multiline playback function, inputs can be recalled, modified, or compared. The Change key converts a fraction into a mixed number or a decimal with a single press. This calculator encompasses all scientific functions needed in school, such as statistics (1&2 variables, 7 regressions), base calculations (dec, hex, oct, bin, pen), and logical operators.