Number Talks Helping Children Build Mental Math and Computation Strategies by Sherry Parrish
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Transcript of Number Talks Helping Children Build Mental Math and Computation Strategies by Sherry Parrish
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Number Talks
Helping Children Build Mental Math and Computation Strategies
by Sherry Parrish
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What is a Number Talk?
a classroom conversation around purposefully crafted computation problems that are solved mentally
opportunity to collectively reason
5 – 15 minutes long
whole- or small- group
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Rationale for Number Talks
many students think of mathematics as a set of procedures or rules
memorization of procedures crumbles when they are asked to generalize concepts
Our students MUST have the ability to… reason about quantitative information possess number sense check for the reasonableness of answers
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Students must be able to compute…
Accurately◦get correct answer
Efficiently◦Choose an appropriate, expedient strategy
Flexibly◦Use number relationships with ease
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Example…
49 x 5
A student should think 50 is one more group of 5, so I can up 49 to 50 and then subtract one group of 5.
50 x 5 = 250250 – 5 = 245
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Aligns withCommon Core Standards
Standards of Mathematical Practices
Grade level content standards
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In summary…
Number Talks is a purposeful vehicle:
◦making sense of mathematics
◦developing efficient computation strategies
◦communicating mathematically
◦reasoning and proving solutions
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Key Components
1. Classroom environment and community
2. Classroom discussions
3. The teacher’s role
4. The role of mental math
5. Purposeful computation problems
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4 Essentials to SettingProcedures and Expectations
Select a designated location
Provide appropriate wait time
Accept, respect, and consider all answers
Encourage student communication
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Format of a Number Talk
1. Teacher presents the problem.
2. Students figure out the answer.
3. Students share their answers.
4. Students share their thinking. 5. The class agrees on the "real" answer for the
problem.
6. The steps are repeated for additional problems.
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Goals for K – 2 Number Talks
Developing number sense
Developing fluency with small numbers
Subitizing
Making tens
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Use Models & Tools
ten frames
dot cards
rekenreks
literature
number lines
hundred chart
real life context
unifex cubes
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Math Talk
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Accountable Talk
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Reinforce conceptsthrough practice…
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Common Core Standards
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VPS Kindergarten Scope & Sequence
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VPS 1st Grade Scope & Sequence
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Questions