Summary
In “On the Move,” the Numberjacks leap out of the sofa to fix a maths problem all about conservation of number. A full episode (~14 min) from the BBC CBeebies maths-adventure series — a quick, friendly way to anchor a numeracy warm-up or maths centre.
Viewer safety
All ages
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Teaching resources
Discussion questions
Discussion
Moving things around or turning them over doesn't change how many there are -- the number stays the same.
- Did the amount change when things were moved around?
- How do you know it is still the same number?
- What is the quickest way to check?
Quick work-a-long
Vocabulary: same, count, rearrange, conservation, amount.
Try it: Count five objects, spread them out, then bunch them up -- count again to prove it is still five.