Supply and demand
A heatwave hits Lahore. Predict the new price of air coolers.
Fair shares
Split a roti between friends to find equal fractions.
Try it
Takes about 1 minute.
The problem
Children learn that 2/4 = 1/2 as a rule, without seeing that the shares are the same.
Who it's for
Primary maths teachers and school systems
Before and after
See how we make a difference
Before
As it usually is
- A rule to copy: multiply the top and bottom by the same number.
- A page of sums.
After
Redesigned
- Change 1: Children cut a roti into equal pieces and share it.
- Change 2: They see two different fractions cover the same amount.
- Change 3: The fraction updates as they cut and choose.
- Reason for change 1: A familiar object makes the idea concrete.
- Reason for change 2: Seeing equal shares comes before the rule, so the rule makes sense.
- Reason for change 3: Children can test their own guesses.
In person
Using this in a workshop
In a teacher workshop, teachers try it as their students would, then plan the same activity with paper circles. In class, children try it in pairs before working on paper.
How we'd build this for you
A model learners move themselves
This activity is one example of a pattern that works in almost any subject. Here's how the same idea could look in yours.
- Primary scienceChange the angle of a slope and watch how far a ball rolls.
- GeographyChange the scale on a map and see the distance change.
- Secondary mathsMove a point and watch the gradient of a line change.
- Personal financeSplit a shared bill fairly between friends.
- CookingScale a recipe up for more guests.
We build it with your subject experts and your own examples, for your workshops and your learning platform. Every piece works on phones, by keyboard and with screen readers.
Free to use
Use it in your teaching
Add this activity to your own course or training, free, with credit to ApexID.
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Portfolio projects made by ApexID to show the kinds of interactive learning we build. Not client projects.