Author:
Samuel Shackleford
Subject:
Mathematics, Numbers and Operations
Material Type:
Lesson Plan
Level:
Lower Primary
Grade:
1, 2
Tags:
  • Addition Facts; Counting on
  • Additive Identity Property
  • License:
    Creative Commons Attribution Non-Commercial
    Language:
    English
    Media Formats:
    Downloadable docs

    Education Standards

    Addition Fact Strategies- Additive Identity

    Overview

    Students will solve contextual word problems and explain why the sum of any number and zero is the nonzero number. Some students have the misconception that since you are adding then the sum must be larger than the start. Using context problems and concrete manipulatives can help students visualize the reationship.

    ***Note: Purposefully choose values for the context problems that are accessible for the student. The focus of the lesson should be on the Additive Identity Property.

    Zero Facts

    Students will use unit cubes (or another type of counter) and a graphic organizer (Sum-Total Mat) to represent the action or non-action expressed within the context problem. Show students what the number facts look like with two parts that has one part left empty. Once they have shown proficiency with representing using concrete models, then have them move on to Task 2: Representing Zero Facts

     

    Using the counters or unit cubes to represent the problems.

    Once students have represented the problem, they will then record their work as a drawing and as a number sentence (Sum-Total Mat evidence page). Using this as evidence students should be able to explain the pattern that expresses the Additive Identity.

    Make a drawing a drawing and a number sentence to represent each of the problems from above.