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Constructing Mathematical
Arguments
Jana Banks
Karen Brown
Lucy Marincel
Purpose
- Students were explaining their thinking but it felt like something
was missing.
- How can we support students to push past the word ¡°efficient?¡±
Purpose
? What could help students construct viable
arguments and critique the reasoning of
others (SMP.3)?
? How can we make the ¡°prove it¡± more
natural?
Always, Sometimes, Never
Mathematical Statements
? Statements we tried on:
¨C When you add, you can take an amount from one
addend and give it to the other without changing
the sum.
¨C The equal sign means the answer comes next.
? As you watch these videos, think:
¨C How are students trying to prove their thinking?
¨C What student moves support SMP.3?
When you add, you can take an amount
from one addend and give it to the other
without changing the sum.
*Audio clips of students have been removed.
When you add, you can take an amount
from one addend and give it to the other
without changing the sum.
*Audio clips of students have been removed.
Modeling of an Argument
The equal sign means the answer comes next.
What do you notice? Wonder?
Supporting SMP.3
? How are students trying to prove their thinking
? What student moves support SMP.3?
? A few moves our students have already combed out
that help convince others:
¨C Examples
¨C Counterexamples
¨C Describe what is happening without using numbers
¨C Background information
? Other thoughts?
Try it out!
? Please choose geometry and/or fractions. The point
isn¡¯t to rush but to develop rich arguments and try to
convince your partner if and when you disagree.
? Work with a partner and decide where to tape your
statement.
? Feel free to write all over your paper!
? Note: This work is messy! We may not know if we
are right or wrong.
Think back to standards
? How does this work support SMP.3?
¨C Create viable arguments and critique the
reasoning of others.
? How does this work support SMP.4?
¨C Model with mathematics.
? How does this work support SMP.7?
¨C Look for and make use of structure.
Teachers as Learners
? How did this feel?
? What struggles did you have?
? What statements were tricky? Easy?
? What helped you to support your opinion?
Reflections
? How could this be used in your classroom?
? What are you excited about?
? What did you notice about your own thinking?
? What did you notice about your partner¡¯s
argument?
? What are you still wondering about?
? What are you curious about?
? Can this concept be used in other content areas?
Resources
? There is a crowd-sourced list on Google Drive of Elementary Always,
Sometimes, Never statements. I can share with you!
? Includes resources of how other teachers are implementing this
work in their classrooms.
? Jana Banks
? Karen Brown
¨C karen.brown.dcps.4@gmail.com (send emails here for
resources)
¨C Twitter: @kiby33
? Lucy Marincel

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Creating Math Arg 5_1_15 *pubilc

  • 2. Purpose - Students were explaining their thinking but it felt like something was missing. - How can we support students to push past the word ¡°efficient?¡±
  • 3. Purpose ? What could help students construct viable arguments and critique the reasoning of others (SMP.3)? ? How can we make the ¡°prove it¡± more natural?
  • 5. Mathematical Statements ? Statements we tried on: ¨C When you add, you can take an amount from one addend and give it to the other without changing the sum. ¨C The equal sign means the answer comes next. ? As you watch these videos, think: ¨C How are students trying to prove their thinking? ¨C What student moves support SMP.3?
  • 6. When you add, you can take an amount from one addend and give it to the other without changing the sum. *Audio clips of students have been removed.
  • 7. When you add, you can take an amount from one addend and give it to the other without changing the sum. *Audio clips of students have been removed.
  • 8. Modeling of an Argument The equal sign means the answer comes next. What do you notice? Wonder?
  • 9. Supporting SMP.3 ? How are students trying to prove their thinking ? What student moves support SMP.3? ? A few moves our students have already combed out that help convince others: ¨C Examples ¨C Counterexamples ¨C Describe what is happening without using numbers ¨C Background information ? Other thoughts?
  • 10. Try it out! ? Please choose geometry and/or fractions. The point isn¡¯t to rush but to develop rich arguments and try to convince your partner if and when you disagree. ? Work with a partner and decide where to tape your statement. ? Feel free to write all over your paper! ? Note: This work is messy! We may not know if we are right or wrong.
  • 11. Think back to standards ? How does this work support SMP.3? ¨C Create viable arguments and critique the reasoning of others. ? How does this work support SMP.4? ¨C Model with mathematics. ? How does this work support SMP.7? ¨C Look for and make use of structure.
  • 12. Teachers as Learners ? How did this feel? ? What struggles did you have? ? What statements were tricky? Easy? ? What helped you to support your opinion?
  • 13. Reflections ? How could this be used in your classroom? ? What are you excited about? ? What did you notice about your own thinking? ? What did you notice about your partner¡¯s argument? ? What are you still wondering about? ? What are you curious about? ? Can this concept be used in other content areas?
  • 14. Resources ? There is a crowd-sourced list on Google Drive of Elementary Always, Sometimes, Never statements. I can share with you! ? Includes resources of how other teachers are implementing this work in their classrooms. ? Jana Banks ? Karen Brown ¨C karen.brown.dcps.4@gmail.com (send emails here for resources) ¨C Twitter: @kiby33 ? Lucy Marincel

Editor's Notes

  • #3: Jana¡¯s slide
  • #4: Jana¡¯s slide