Poorly designed group work becomes a grade subsidy: stronger students prop up weaker students’ grades while weaker students miss the learning that would make them stronger.

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Bad group work hides everyone’s weaknesses and transfers the real learning to the person who needed it least. It ends with the student who knows the least learning nothing and the student who knows the most doing everything.

This is not some minor classroom inconvenience. It is a structural failure mode. The weaker students gets carried across the finish line without having to confront their missing subskills. The group produces an artifact, but the learning is badly distributed.

From the outside, it can look collaborative. Everyone is engaged. The project gets submitted. The room sounds active. But engagement does not imply learning. Output does not imply that each person learned the thing the assignment was supposed to teach.

Learning requires direct contact with the work. You have to retrieve, attempt, make mistakes, and correct them yourself. Someone else cannot do that for you. Division of labor is division of learning. Concentration of labor on one student is concentration of learning on one student.

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