3-5-ETS1-3: Run fair tests and improve a design.

Official text

Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved.

What it means for your child

Your child plans and carries out fair tests that change only one thing at a time, finds where a model fails and improves it.

Try it at home

1. Build paper airplanes and change only one thing, like the wing shape, between tests.
2. Ask, 'What stayed the same in each test?'
3. After a test, ask, 'Where did it fail? What would you change?'