This collection of STEM resources is based around ratio and proportion, area and volume. Resources are listed in order of stage.
problem
Favourite
Mixing lemonade
Age
11 to 14
Challenge level
Can you work out which drink has the stronger flavour?
problem
Food chains
Age
11 to 14
Challenge level
When a habitat changes, what happens to the food chain?
problem
Tray bake
Age
11 to 14
Challenge level
My recipe is for 12 cakes - how do I change it if I want to make a different number of cakes?
problem
Pinhole camera
Age
11 to 14
Challenge level
Make your own pinhole camera for safe observation of the sun, and find out how it works.
problem
Toad in the hole
Age
11 to 14
Challenge level
Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?
problem
Investigating the dilution series
Age
14 to 16
Challenge level
Which dilutions can you make using only 10ml pipettes?
problem
The genes of gilgamesh
Age
14 to 16
Challenge level
Can you work out the parentage of the ancient hero Gilgamesh?
problem
Molecular sequencer
Age
14 to 18
Challenge level
Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.
problem
Peas in a pod
Age
14 to 16
Challenge level
What is the chance this pea plant will look like its parents?