EXD.5:4.1 - Select the target and the product
Recover the learning purpose, current question and warranted subject relation. Choose a product that makes that relation inspectable: a short explanation of one step, labels and arrows with stated meanings, a worked correspondence or an enactment with an explanation of what each action represents.
State a criterion for the relation, not a preferred phrase. For the pooled mean, the product should show what the denominator counts and how each group’s sum is recovered. Fluency, length or agreement with the teacher cannot replace that criterion.
Use EXD.2 when the instance and contrast need construction. Keep legitimate tools available when the intended performance allows them.