Self Assessment

Here is an situation given to pupils which involves micro-organisms, decay and disease.

They are asked to explain what is happening.

Alexander's mum finds some left over chicken in the fridge.


So, she makes chicken sandwiches for his packed lunch.

It is a lovely warm summer's day, and when Alexander gets to school he puts his lunch box on the window sill.
At lunch time he picks up a sandwich, smells it, and says "yuk! this chicken's gone off."

What do you think is going on inside the chicken to make it smelly and no good to eat?

Actual Year 6 pupil responses (look at these after completing Task 1)



  • a diversity of organisms exists, and includes bacteria, fungi, plants and animals;


  • a diversity of organisms is found in most habitats;
  • the organisms, including humans, in an ecosystem interact with each other and with the physical aspects of the environment;


  • micro-organisms are widely distributed.

to support the teaching of KS1 and KS2 Programmes of Study, for example:

  • locally occurring animals and plants can be identified and assigned to groups using keys;
  • animals and plants show adaptations to their environments;
  • food chains describe feeding relationships and generally start with green plants
  • some micro-organisms are beneficial to humans while others are harmful


Diversity of organisms
Ecosystems and habitats
Species interaction
Self assessment (1)