TES Maths Resource of the Week
What is it?
Previously confined to biology classrooms, the capture-recapture method of sampling has made its way onto the new higher Edexcel GCSE specification. Thankfully, the TES Maths community have been busy creating relevant resources and have come up with some crackers.
Dive in using this comprehensive lesson, which includes a presentation with worked examples and a codebreaker activity ending in a typically corny joke.
How can it be used?
The resource itself is straight-forward, but it offers plenty of opportunity to discuss the logic, merits and limitations of the capture-recapture technique, as well as the necessary assumptions that make it a valid process.
As ever, you can always challenge your students to make up their own questions. Or - and this is my preferred option - do a live demonstration of the technique in class using a bag of coloured counters. Maths in action!
For more lesson ideas on the capture-recapture method, check out this post on teaching sampling as part of the new specification.
Craig is a secondary maths teacher in the North of England.
Why not keep up with the latest blog posts in our dedicated maths area?