- Author:
- Samuel Shackleford
- Subject:
- Mathematics, Numbers and Operations
- Material Type:
- Lesson Plan
- Level:
- Lower Primary
- Grade:
- 1, 2
- Tags:
- 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.