TES Maths ROTW: Percentages spot the mistake

Craig Barton
14th September 2015

TES Maths Resource of the Week

Resource title: Spot the mistake - Percentages

Resource author: alutwyche

What is it?

Students always moan when they have to copy down notes. My view has been that if they write the notes themselves (especially when I ask them to do so in their own words), then it is likely to mean more to them and be easier to remember.

Well, here is an alternative. It is a set of seemingly helpful notes covering all the major aspects of percentages, but with one important twist – there are mistakes throughout that students have to spot.

How can it be used? 

This activity would work particularly well either at the end of a series of lessons on percentages, or as part of a general review of past topics - perhaps in the build up to GCSE exams. Students could be challenged to correct the notes and give examples of the common mistake that has been made.

You could go one stage further and get students to create their own versions of 'spot the mistake' revision notes to try on each other. And, without wishing to state the obvious, make sure all mistakes are corrected before the students leave the room or key misconceptions could be reinforced, which isn’t exactly ideal!


Craig Barton

Craig is a secondary maths teacher in the North of England.


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