This collection of STEM resources is based around the topic of trial and improvement. Resources are listed in order of stage.
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
Temperature
Age
11 to 14
Challenge level
Is there a temperature at which Celsius and Fahrenheit readings are the same?