Shared standard remains calculation + purpose-based choice + evidence + limitation. Do not label learners beginner/advanced. The two blank checks need a private, low-stakes recheck because blankness does not identify knowledge.
0-8 min diagnostic: individually order 9,2,4,3; calculate mean/median; choose a typical value for 3,4,4,5,60 and explain. Offer bilingual terms and large print to everyone who needs them. Sort work, not people, into temporary needs: P prerequisite procedure, C conditional-choice misconception, R ready to transfer; blank responses complete an oral or number-card alternative.
8-25 min common core: physically order number cards, model even/odd median and show how 60 changes mean. All learners predict, calculate, then explain. Check: each pair names the purpose before choosing. P pathway, 25-45 min: worked example with steps “order→count→middle,” then faded worksheet and immediate one-item check. C pathway: contrast two datasets where an apparent extreme is an error versus a valid high value; rewrite “always” as a conditional rule. R pathway: compare two defensible choices for salary data and identify information needed; this adds reasoning depth, not more routine questions. Teacher rotates; bilingual term card and large-print material persist across paths.
Movement at minute 45: a learner moves to common application after independently calculating an even-count median and explaining one conditional choice; otherwise receives one new example and targeted feedback. No permanent grouping. Minutes 45-68 mixed pairs solve a workplace scenario with assigned explainer/checker roles, then swap. Minutes 68-78 individual rehearsal; teacher rechecks evidence and limitation. Minutes 78-88 common unseen assessment; minutes 88-90 exit question.
Common rubric: calculations correct; purpose named; choice supported by distribution/extreme evidence; one limitation. Fairness audit: same construct/outcome, multiple response access only where approved, no device/homework advantage, extensions deepen target. Prepare three card sets, bilingual glossary, standard/large-print sheets, answer evidence. If >8 still miss ordering at minute 45, pause pathways for a five-minute whole-class concrete remodelling and shorten pair application—not the assessment standard.