The Casio FX-85GT ClassWiz Scientific Calculator contains additional features, to include high definition display and improved menu navigation. Allowed in every UK exam where a calculator can be used. Recommended and approved for Key Stages 3 and 4 (including GCSE, National and Higher, Junior and Leaving). The large natural textbook display shows mathematical expressions like roots and fractions as they appear in your textbooks which increases comprehension because results are easier to understand.