Unit 1: Building a Mathematical Community while Working with Numbers within 20

Lesson 1:  Jumping Contest

NC.2.MD.6

2nd Grade Unpacking Document

• I can represent whole numbers as lengths on a number line diagram, representing whole-number sums and differences within 20.

• Video Links:

  • WCPSS Using a Number Line to Add or Subtract

Lesson 2:  Paper Airplane Contest

NC.2.MD.6

2nd Grade Unpacking Document

• I can represent whole numbers as lengths on a number line diagram, representing whole-number sums and differences within 20.

• Video Links:

  • WCPSS Using a Number Line to Add or Subtract

Lesson 3:  Legos and Number Lines

NC.2.MD.6

2nd Grade Unpacking Document

• I can represent whole numbers as lengths on a number line diagram, representing whole-number sums and differences within 20.

• Video Links:

  • WCPSS Using a Number Line to Add or Subtract

Lesson 4:  Odd and Even Numbers

NC.2.OA.3

2nd Grade Unpacking Document

• I can explore the concept of odd and even by pairing objects into groups then counting by twos.

• Video Links:

  • WCPSS Pairing Objects to Determine if a Number is Even or Odd

Lesson 5:  YES or NO... How Do You Know?

NC.2.OA.3

2nd Grade Unpacking Document

• I can determine whether a group of objects is odd or even using a variety of strategies.

• Video Links:

  • WCPSS Pairing Objects to Determine if a Number is Even or Odd

Lesson 6:  Discovering Patterns of Even and Odd

NC.2.OA.3

2nd Grade Unpacking Document

• I can determine whether a group of objects is odd or even using a variety of strategies.

• Video Links:

  • WCPSS Pairing Objects to Determine if a Number is Even or Odd

Lesson 7:  Pattern Talks

NC.2.OA.3

2nd Grade Unpacking Document

• I can determine whether a group of objects is odd or even using a variety of strategies verifying my thinking on the number line.

• Video Links:

  • WCPSS Pairing Objects to Determine if a Number is Even or Odd

Lesson 8:  Ten Frame Flash

NC.2.OA.2

2nd Grade Unpacking Document

• I can begin to demonstrate fluency for addition within 20, using the “Make Ten” strategy.

• Video Links:

  • WCPSS Mental Strategy-Making ten

Lesson 9:  Count On to Find the Total

NC.2.OA.2

2nd Grade Unpacking Document

• I can begin to demonstrate fluency for addition within 20, using the counting on strategy.

• Video Links:

  • WCPSS Mental Strategy-Counting on

Lesson 10:  Count On to Find the Partner

NC.2.OA.2

2nd Grade Unpacking Document

• I can begin to demonstrate fluency for addition and subtraction within 20, using the counting on strategy.

• Video Links:

  • WCPSS Mental Strategy-Counting on

Lesson 11:  Relating Addition and Subtraction

NC.2.OA.2

2nd Grade Unpacking Document

• I can begin to demonstrate fluency for addition and subtraction within 20, using the relationship between addition and subtraction.

• Video Links:

  • WCPSS Mental Strategy-Using the relationship between addition and subtraction

Lesson 12:  Equations and Equality

NC.2.OA.2

2nd Grade Unpacking Document

• I can begin to demonstrate fluency for addition and subtraction within 20, using the relationship between addition and subtraction.

• Video Links:

  • WCPSS Mental Strategy-Using the relationship between addition and subtraction

• Virtual Manipulatives:

  • Math Balance

Lesson 13:  Mental Strategies for Addition and Subtraction

NC.2.OA.2

2nd Grade Unpacking Document

• I can use strategies to demonstrate fluency for addition and subtraction within 20.

• Video Links:

  • WCPSS Mental Strategy-Using Doubles

  • WCPSS Mental Strategy-Making Ten

  • WCPSS Mental Strategy-Counting On

  • WCPSS Mental Strategy-Creating an Easier Problem

  • WCPSS Mental Strategy-Using the Relationship between Addition and Subtraction