Expired a long time ago approx 11 months, now at Tesco online, great reviews, I presume from the younger generation as I wouldn't know how to work it " old age thing me thinks lol " have a look you might find it useful for education purposes at that price.
The Casio fx-83GT Plus calculator has an innovative twinline 10 digit ‘natural text book display,’ which makes the numbers and formula easier to read.
This black calculator is packed with 260 functions, including 164 scientific functions (verify, prime factorisation, recurring decimals and random integers etc.) to help your child with their Key Stage 3 and 4 mathematics.
The FX-83GT Plus comes with a slide-on hard case and features an automatic shut-off function. Batteries are included.
Read more at http://www.tesco.com/direct/casio-fx-83gt-plus-scientific-calculator/210-0796.prd#jCZiPSHea8qTTLYf.99