Day 44: A full ten is ten objects

Useful outcome

Make a reliable tens-and-ones label. Use existing safe pieces, original marks or the empty own organiser. Full description. The child may keep the product private.

Prepare and check entry

Prepare the ordinary whole 32 and separate counted/waiting space, two or three parts as relevant, large numeral cards and optional verified ten-strips. Audit a ten before using it. Ask for one-to-one coverage and value of a full unit. Teach missing entry knowledge on a new small collection before today's larger example. Smaller actual quantities remain useful and are named.

Run the 25-minute component

  1. Start, 3 minutes: offer the useful outcome. Ask what amount is being organised and how we can include each object once.
  2. Model, 5 minutes: 30 + 2 = 32. These describe one original collection. Verify each part and include each object once. Open one strip and count its ten cells. A verified strip can stand for ten objects. Build three full tens and two singles. Name thirty and two, not three and two. Connect those quantities to 32. Use another two-digit number to check the connection.
  3. Try together, 7 minutes: the child selects boundaries/members; an adult may move marks at their direction. Ask “What is in each part? What stayed the same?” Check by the actual members, not only matching printed numerals.
  4. Choose, 7 minutes: take one of Card sleeves, Paper badges, Reusable score marks. Different purposes/quantities give new work; they are not fixed sensory learner labels.
  5. Show and check, 3 minutes: ask for today's relevant part values, whole and one reason. Keep first thinking/support, then a revision if needed. A model already supplied is not independently invented.
  6. Next invitation: If a child says five for three strips plus two, open one strip, touch its ten marks and label the object value. Then use a new two-strip model before returning to three strips.

Likely confusion and response

Three ten-strips are three groups but thirty objects. A long unverified line is not automatically ten. If a child says five for three strips plus two, open one strip, touch its ten marks and label the object value. Then use a new two-strip model before returning to three strips.

What to notice

Look for correct whole/part membership, matching quantities, the day's particular exchange/transfer/check and a supported reason. A correct whole alone does not prove every component. A child can choose a valid partition different from the model. Record actual quantity, access support and mathematical prompts; do not grade voice, handwriting, speed or motor independence.

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