Choosing calculators for school learning and office tasks

Decide what the calculation is for

Write down the functions needed before comparing models. An office may need clear basic arithmetic and an easily read display; a mathematics department may need a specified scientific function set. Where a calculator is intended for an assessment, check that assessment's current requirements rather than assuming that any scientific model is permitted.

Think about how pupils will explain their method. A calculator can help check arithmetic, explore repeated calculations or work with authentic measurements, but the activity should still make the meaning of the result visible. Ask for an estimate before keying in a calculation so an implausible answer is easier to notice.

Test the controls with actual users

Use the same short tasks on each shortlisted device. For example, divide 18.6 metres of material into six equal lengths and interpret the answer as 3.1 metres, rather than recording a number without a unit. Try correcting a mistaken entry and clearing a previous result. Check how the decimal point, negative sign and operation symbols appear on the screen.

Consider key spacing, contrast, viewing angle and whether the device remains steady on the desk. A large display does not automatically make every key easier to use. Let pupils who have particular access needs try the controls before committing to a standard class set.

Make a shared set dependable

Number the calculators and their storage spaces so missing items are visible at the end of a lesson. Keep a simple count of working, damaged and replacement devices. Check the stated power arrangement and battery access procedure; do not assume every model recharges or uses the same battery.

Store concise instructions for the functions teachers actually use, including how to clear unusual modes or previous settings. For important office totals, repeat the calculation or use a separate checking method. An accurately keyed answer still depends on choosing the correct numbers and operation.