Ask a Kuwaiti secondary student what calculator they need and this model number comes back more often than any other: it is what teachers demonstrate on the board and what worked examples in the textbook are written around. Fractions, surds and standard form appear the way they are printed in the book rather than flattened into a single line, so a student checking their working sees the same shapes on screen and on the page. That familiarity is the whole point.
— The Ghalyh team · How we pick
Good for
Secondary maths and physics · university foundation years · anyone whose teacher demonstrates on this model
Not for
Graphing. It solves and computes but draws nothing — a course that wants curves on screen needs a graphing calculator instead.
Specifications
- Model
- Casio fx-991ES Plus
- Display
- Natural display — fractions and roots as printed
- Exam use
- Non-programmable scientific class; check your own exam's list
Questions people ask
fx-991ES Plus or fx-991EX?
The EX is the newer generation with a sharper screen and more functions; the ES Plus is the long-standing one many teachers still specify by name. If your school named a model, buy that one — matching the teacher's keystrokes matters more than the spec sheet.
