Codes: AC9M3N01, AC9M3N05. Target: sample what is secure about five-digit place and estimate reasoning. Set out: Check A, mat, 38 paper counters hidden until the estimate task.
- Purpose · 2 min. Say: “Show how you chose, so I can choose useful practice for next week.”
- Rehearsal · 5 min. With the class build 16 230 and explain its zero ones. Rehearsal is not scored evidence.
- Place prompt · 6 min. Everyone represents 14 305 and compares it with 14 350. Ask for the first different place. Sample a small planned group privately at the side table; note help given.
- Estimate prompt · 7 min. Show the new 38-counter tray briefly. Learners record an interval/estimate before counting. Group into tens and ones, count 38 and explain how the estimate changed. A partner can count while learner directs groups; record who did what.
- Feedback · 3 min. Give a concrete observation: “You kept the zero tens in 14 305. Let's practise finding the first different place when we compare.” Let each learner repair one part.
- Close · 2 min. Child names a place or counting strategy to reuse. Teacher keeps check answers and a next step, not a permanent ability label.
Access: independent explanation can be collected later in a short quiet station. If vision or motor access blocks the first estimate, use tactile sealed bag size/weight with matched comparison bags, and note that it is a different estimation task.