Number Talks - WordPress.com · 2017. 9. 11. · Number Talks Holly Elementary ... alks Matter:...
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Number Talks Holly Elementary School • April 12, 2017 Chris Hunter • @ChrisHunter36
Transcript of Number Talks - WordPress.com · 2017. 9. 11. · Number Talks Holly Elementary ... alks Matter:...
Number Talks
Holly Elementary School • April 12, 2017Chris Hunter • @ChrisHunter36
How many do you see?How do you see them?
@Trianglemancsd
How many do you see?How do you see them?
BIG Ideas (Elaborations): “Computational fluency develops from a strong sense of number.”
How many?
How many?
How many?
How many?
How many?
BIG Ideas (Elaborations): “Computational fluency develops from a strong sense of number.”
What is computational fluency?
“Students demonstrate computational fluency when they demonstrate flexibility in the computational methods they choose, understand and can explain these methods, and produce accurate answers efficiently.”
– NCTM (1989)
“Simply defined, number talks are five to fifteen minute classroom conversations around purposely crafted computation problems that are solved mentally.”
“The heart of number talks is classroom conversations focused on making sense of mathematics.”
8 + 6
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What do you noticethe students doing?the teacher doing?
16 × 35
16 × 35
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What do you noticethe students doing?the teacher doing?
6 × 6
3 × 6
3 × 12
Getting Number Talks Started
Subtraction
63 – 28
(1) Round the subtrahend to a multiple of ten and adjust
(2) Decompose the subtrahend(3) Add instead(4) Same difference
Subtraction Strategies
6.3 – 2.8
Partitioning is important!
Why?
7 = 5 + 2 7 = 4 + 3
Why choose one over the other?
70 – 34
70 – 34
Planning a Number Talk Anticipate different strategies students might use for solving the problem (or how they might “see” a dot card).
How will you record each of these strategies?
What questions might you ask to fully understand and represent a student’s thinking and/or method?
In reflecting on this Number Talk, what do you want to remember, what problem might you do next, and why?
Humphreys, C. & Parker, R. (2015) Making Number Talks Matter: Developing Mathematical Practices and Deepening Understanding, Grades 4-10. Stenhouse.
70 – 34
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What aspects of this number talk would you want: • the teacher to see as promising?• to help the teacher to work on?
