ENCHANTED GARDEN MATH for 3 to 5 YEAR OLDS Tory Sawyer TC MA
CollaborangTeachers - Math Garden · CollaborangTeachers Grade2 ......
Transcript of CollaborangTeachers - Math Garden · CollaborangTeachers Grade2 ......
Collabora'ng Teachers
Grade 2 Monday, September 9, 2013 Children’s Strategies for Addi'on and Subtrac'on
Number Talks
A resource for growing children’s strategies: • Number Talks: Helping Children Build Mental Math and Computa?on Strategies, Grades K-‐5
• Author Sherry Parrish • Math Solu?ons
• Pub. 2010
Four Goals for K-‐2 Number Talks
1. Developing number sense 2. Developing fluency with small numbers
3. Subi?zing 4. Making tens
Classroom Clip: Ten-‐Frames and Dot Cards
1. What ques?ons does the teacher pose to build understanding?
2. What strategies are the students using to build meaning of the numbers?
3. What examples of subi?zing, conserving number, and one-‐to-‐one correspondence do you no?ce?
4. What opportuni?es are created for students to begin building an understanding of ten?
Ques?ons to consider:
• How does the teacher build student fluency with small numbers?
• What ques?ons does the teacher pose to build understanding?
• How are the tools and models used to support the goals of the ac?vity?
• What opportuni?es are created for the students to begin building an understanding of ten?
• How does the teacher support student communica?on during the number talk?
3 categories of Number Talks
• Category 1 – Introductory talks that encourage a specific strategy.
• Category 2 – Crabed for students who are successfully using the selected strategy.
• Category 3 – Provides opportuni?es to use and extend the targeted strategy.
• What strategy do the next slides support?
Doubles/Near-‐Doubles
Category 1 Category 2 Category 3 9 + 9 15 + 15 50 + 50
9 + 8 16 + 16 49 + 49
9 + 10 15 + 14 48 + 49
15 + 16 48 + 48
49 + 51
Other Grade 2 Strategies
Addi?on • Doubles/Near-‐Doubles • Making Tens
• Making Landmark or Friendly Numbers
• Breaking Each Number into its Place Value
• Compensa?on
• Adding Up in Chunks