This collection of STEM resources is based around ratio and proportion, area and volume. Resources are listed in order of stage.
problem
Toad in the Hole
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
Tray Bake
My recipe is for 12 cakes - how do I change it if I want to make a different number of cakes?
problem
Pinhole Camera
Make your own pinhole camera for safe observation of the sun, and find out how it works.
problem
Molecular sequencer
Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.