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Grade 3 · unit review

Review: Choose, Count and Test Decisions

Apply a condition, repeat it across items and test both branches of a rule.

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Bring the unit skills together

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Unit review questions
1. Rule: star cards → A; all others → B. A card contains a circle and no star. Which branch runs?
2. Rule: if score ≥ 7 write ready; else wait. What happens at fictional score 7?
3. Start matches = 0 and add 1 for each triangle in triangle, star, circle, triangle. What is the final count?
4. Goal: square cards give S, others give O. A draft writes O in both branches. Which test exposes its error?

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Create and test a sorter for fictional cards: if a card has a triangle, write T; otherwise write O. Process triangle, circle, triangle, star and count only the T outputs. Repair a draft that writes O for triangle cards.

Work on paper or in your own document. Explain the choices you made.

  • State the triangle condition and both output actions.
  • Produce outputs T, O, T, O in order.
  • Trace matches from 0 to 1, 1, 2, 2.
  • Use both a triangle test and a non-triangle test to verify the repair.
Compare with a model response

Rule: triangle → T; else → O. Outputs: T, O, T, O. Starting matches = 0, add 1 for each T: 1, 1, 2, 2; final matches = 2. Replace the draft’s triangle action with T. Triangle should give T and circle should give O; both pass after repair.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.