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2-N-2-2

Page history last edited by Tashe Harris 6 years, 1 month ago

2.N.2.2 Demonstrate fluency with basic addition facts and related subtraction facts up to 20.


In a Nutshell

Students enter second grade demonstrating a fluency with basic addition facts and related subtraction facts up to 10. They will expand their fluency to include facts up to 20. In future grades, students will build upon this knowledge to begin fluency in both multiplication and division.

Student Actions

Teacher Actions

  • Developing computational fluency which extends beyond memorization of facts.
  • Demonstrating flexible use of strategies and thinking.

  • Actively engaging in a variety of activities such as dominoes, dice, and card games related to adding and subtracting.

  • Developing a variety of strategies for problem solving.
  • Making reasonable arguments and critiquing the thinking of others when describing a strategy used for adding or subtracting.

  • Determining clear goals for student learning.
  • Posing purposeful questions to help students develop and explain strategies for adding and subtracting.

  • Modeling a variety of strategies for adding and subtracting.

  • Using appropriate vocabulary.
  • Using assessments to uncover student thinking in order to guide instruction and assess understanding.

Key Understandings

Misconceptions

  • Addition and subtraction facts are not simple facts to be memorized but can be applied to real-world problems.
  • Counting is a strategy for fluency.

  • Subtraction is commutative. For example, 5 - 3 = 3 - 5.

OKMath Framework Introduction

2nd Grade Introduction

2nd Grade Math Standards

 

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