Exploratory Talk
Mercer distinguishes disputational, cumulative and exploratory talk. Only exploratory talk, where students challenge ideas with evidence and build on each thinking, improves outcomes.
Find this under Improve classroom discussion
The strategy, as published
Exactly as it appears on the card
Part of Dialogic Teaching & Discussion in 04 Questioning & Discussion, where it sits alongside its neighbouring strategies, the infographic and the thinking for the whole area.
Why you might use it
The problem it may help with
Mercer distinguishes three kinds of group talk. Disputational: I am right, you are wrong. Cumulative: agreement piled on agreement, nothing examined. Exploratory: ideas challenged with evidence and built on together. Only the third improves outcomes.
Exploratory talk is what this strand's thinking describes: pupils reasoning together and making their thinking public. It seldom appears on its own, which is why the ground rules card follows this one.
What it might look like
One version of it, in a classroom
A group is deciding where to site a settlement. One pupil proposes the valley floor for the water supply; another challenges with the flood risk shown on the map; the proposal gets reworked to the terrace above. Challenge carrying evidence, then building: that is the shape to listen for.
Try it
A way to begin
Listen in on one group task this week and ask which of the three kinds of talk you are hearing. Naming it is the diagnostic step.
What to notice
Reading what happens
- Whether disagreement comes with evidence or just with volume.
- Whether any idea actually changes during the talk. In cumulative talk, nothing does.
- Who inside a group is doing the reasoning, and who is assenting.
Things to think about
Before and while you use it
- Disputational and cumulative talk are not misbehaviour; they are what groups default to before the norms of exploratory talk are taught. The ground rules card is the companion piece.
Technology second
Where technology fits
A collaborative document or discussion tool from your school's approved set can hold a group's reasoning as it develops and keep it afterwards, so a useful discussion does not disappear the moment the lesson moves on. The test stays the same: the tool should widen who contributes to the reasoning, never do the reasoning for them.
The wider thinking
Where the evidence sits
Mercer's studies of group talk are the source, and they connect directly to his work on interthinking: exploratory talk is how thinking becomes genuinely shared. The card’s attribution stands as published: Mercer.
The fuller picture, sources included, is in further reading and evidence for Questioning & Discussion.
Keep exploring
Where next?
Back to this strategy in 04 Questioning & Discussion, across to what you're trying to improve, or into all 144 at once.
Want to take this further?
Support is available
Pedagogy First gives you a starting point. If you want support exploring how approaches like this can work across your school, trust or professional learning programme, that work is available.