The Casio fx-83GT CW+ is the UKs best-selling Scientific Calculator (replacing the now discontinued fx-83 GT CW). ​ Recommended and approved for Key Stages 3 & 4, including GCSE, National and Higher, Junior and Leaving. Allowed in every UK exam where a calculator can be used. Clip-on protective hard cover included Battery powered (AAA x 1 supplied) 290+ functions Free 3 year guarantee included The fx-83GT CW+ is available in; black, blue, grey and pink. Reliable and Durable: Built for Learning. Made to Last. Other models to consider - The Casio fx-85GT CW+ provides the same features and functions as the fx-83GT CW+, but with the added feature of being solar powered with battery backup as well as being made from up to 90% recycled materials. ​ ​ The Casio fx-991CW UK+ is Casio’s most advanced scientific calculator, providing UK specific functions such as HCF, LCM and recurring decimals, more than 540 functions and is suitable for Key Stages 3, 4 and 5.