Here is part of the dialogue that took place when a year 4 teacher used some W questions with the H-shape provided.
| Teacher:
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What makes you think the first box is 23?
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| Student:
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It comes after 22.
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| Teacher:
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So what if it was in this row? Tell me what you are thinking.
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| Student:
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All that row starts with 20 and this starts with 30 so it would be 33.
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| Teacher:
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What stayed the same, and why?
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| Student:
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The three because that row [pointing vertically] is all threes.
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| Teacher:
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Three…
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| Student:
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Units? Units.
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| Teacher:
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And where would the five units column be? [Student points] Good, so what can you tell me about the horizontal rows — across like this — and the vertical columns like this? How could you describe the rule, the pattern?
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| Student:
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Horizontal, across, they go up by ones, in order. Tens is vertical, vertical, down, goes up by tens: 15, 25, 35, 45.
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| Teacher:
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Okay. So what if this vertical column was 115, instead of 15. Where would 135 be, and why?
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| Student:
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135. Okay. So that's 115, 125, 135 [pointing correctly].
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| Teacher:
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Good. Why?
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