Give group roles the task cannot run without
'Materials manager' is a title, not a role. Interdependence appears when the group genuinely fails if any one member's job goes undone.
Oct 7, 2026 · 1 min read
Group work collapses into one worker and three spectators when the roles are decorative. Slavin (1995) is clear about the conditions under which cooperative learning actually raises achievement: a shared group goal combined with individual accountability, so the group needs every member and every member can be checked. Design the roles backwards from the task. Each one must own a deliverable the final product cannot exist without, small enough to verify in seconds.
In practice
- Give each role a checkable output: the checker signs off two answers with reasons, the summariser produces the three-line report, the questioner logs what stumped the group.
- Test your design with one question: if this student did nothing, would the product still appear? If yes, the role is decorative; rewrite it.
- Rotate roles across the week so nobody homesteads the easy one, and the strongest student experiences being the checker, not the engine.
- Assess both layers: one mark for the group product, one quick individual check on the shared content afterwards.
Quick takeaway: a real role is one the product cannot appear without.