A Teacher's Journal: Opportunities to Develop Place Value through Student Dialogue
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The problem 11 + 9 was written on the board at the front of the room. Eleven first graders and nine second graders sat on the carpet, their facial expressions intent as they thought about solutions. I had asked them to try to think of strategies they could use that did not involve counting on their fingers. They did not use paper and pencil because this was what we call “Mental Math” time at our school.
1990 ◽
Vol 21
(3)
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pp. 180-206
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2007 ◽
Vol 10
(2)
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pp. 285-293
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2019 ◽
Vol 68
(1)
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pp. 86-107
1981 ◽
Vol 12
(2)
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pp. 95-106
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1978 ◽
Vol 21
(1)
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pp. 166-173
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1989 ◽
Vol 81
(1)
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pp. 109-114
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