Change the Variable
Keep a science or maths explanation but change one condition; learners predict which part of the reasoning changes.
Worked model: Change the Variable
- 1Keep a science or maths explanation but change one condition
- 2Propose a testable relationship between them
- 3Give a scientific reason for the proposed relationship
- 4Check that the investigation could produce evidence against the proposal
In a photosynthesis investigation, change light intensity while identifying which relevant conditions should stay comparable. Ask how a change in another factor would weaken the interpretation.
Teach the move
Prepare · 5 minutes
Choose an investigation with a measurable outcome and a variable that can change.
- 1
Keep a science or maths explanation but change one condition; learners predict which part of the reasoning changes.
- 2
Propose a testable relationship between them.
- 3
Give a scientific reason for the proposed relationship.
- 4
Check that the investigation could produce evidence against the proposal.
EAL upgrade
Remove the if/then frame and require variables and a testable relationship.
Keep the subject challenge. Offer one model, visual or language prompt where needed, then check a fresh independent response.
Try it tomorrow
Choose an investigation with a measurable outcome and a variable that can change.
Keep a science or maths explanation but change one condition; learners predict which part of the reasoning changes. Propose a testable relationship between them.
Ask what measurement would challenge the hypothesis.
Remove the if/then frame and require variables and a testable relationship.
What to look for
Ask what measurement would challenge the hypothesis.
Teacher language
Adapt these prompts to the task and your learners.
Our purpose is: Keep a science or maths explanation but change one condition; learners predict which part of the reasoning changes.
Show the relationship and explain the choice you made.
Try the new case on your own. Show the detail or reasoning that supports your answer.
Which support do you still need, and which part can you now do independently?
Across subjects
Maths: conjecture a rule, then test cases. Humanities: propose an interpretation and identify evidence that could challenge it.
Adjust language support
Use a small word bank, visuals and partner rehearsal when needed. Extend with precise explanations and qualifications. Judge the support from the response to this task.