Number Talks Building Numerical Reasoning

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Presentation transcript:

Number Talks Building Numerical Reasoning Leann M. Cervantes

Purpose As a result of this session, participants will develop enough confidence to begin implementation of Number Talks in their classroom

Ice Breaker

Do now Tell me everything you know about: 20

AGENDA Do Now What is a Number Talk? 5 Key Components Signals Teacher Questioning and Talk Moves Whole Group Practice Exit Ticket

Solve Mentally…no paper or pencil! 45 x 12

What is a Number Talk? A short, on-going daily routine of meaningful practice of mental math computation fluency

Guidelines 10 to 15 minutes every day Everyday Whole Group Away from "normal" desk

Talk Moves Revoicing: So what you are saying is… Repeating: Can you tell me what J said in your own words? Reasoning: Do you agree with J? Why or why not? Adding On: Can you help or continue what J is saying? Wait Time: Give them time to think!

5 Key Components of Number Talks Classroom environment Discussions Teacher roles Mental math role Purposeful computation (making 10, friendly numbers, double and half, break apart (decompose), number lines)

Signals Thinking I have an answer I have a strategy, 2,3 I agree

Practice

Subitizing rapid, accurate and confident judgment of number performed for small number of items

Signal

Signal

Making 10

9 + 1 9 + 3 + 1 9 + 5 + 1

3 + 7 7 + 5 + 3 13 + 6 + 7

Friendly Numbers

19 + 2 26 + 5 49 + 8 39 + 11

39 + 16 28 + 39 59 + 13 23 + 49

Break Apart

6 x 6 9 x 4 13 x 5 25 x 12

9 x 30 4 x 2 x 8 2 x 25 x 4

Doubling and Halving

8 x 125 4 x 250 2 x 500

36 x 5 19 x 10 9 x 20

Practice http://schoolwires.henry.k12.ga.us/cms/lib08/GA01000549/Centricity/Domain/3791/Making%20Tens%20number%20sentences.pptx Making tens http://schoolwires.henry.k12.ga.us/cms/lib08/GA01000549/Centricity/Domain/3791/1st_Dots_Set_for_Counting_All_Counting_On.pptx Dots http://schoolwires.henry.k12.ga.us/cms/lib08/GA01000549/Centricity/Domain/3791/Doubling%20and%20Halving%20with%20multiplication.pptx Doubling/halving http://schoolwires.henry.k12.ga.us/cms/lib08/GA01000549/Centricity/Domain/3791/Making%20Landmark%20or%20friendly%20numbers%20Grades%203%20-%205.pptx Friendly numbers http://schoolwires.henry.k12.ga.us/cms/lib08/GA01000549/Centricity/Domain/3791/Breaking%20Factors%20into%20Smaller%20Factors.pptx Break apart

Talk with a partner: Why is mental math important? How does Number talks fit in? How can we fit it in our daily math routine?

Exit ticket Solve and scribe using only mental math: 28 + 47 76 – 48 (timeline) 32 x 2 (double and half)