# Lesson Plan: Life Cycle (Math - Grade 1)

Subject:  Math

Lesson Objective: To use addition and subtraction to solve word problems

Common Core Standard:  CCSS.MATH.CONTENT.1.OA.A.2- Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Materials:

Starter:

Say:

• How do you add numbers?  (Allow the students to answer.)

Main:

Say:

• When you add numbers, you are putting them together.  For example, if you are adding 1 + 2, you are putting one of something and two of something together.  What answer would you get?  (Allow the students to answer.  You can use your fingers to show them adding.)
• When figuring out an addition problem, it is a good idea to draw a picture to help you.  If you were adding 1 + 2, you could draw one circle and then two more circles.  (Demonstrate this)
• You would then be able to count all of the circles by pointing to each one as you count.  You would see that there are 3 circles.  So, you know the answer to 1 + 2 is 3.
• Today, you are going to be solving word problems.
• To solve a word problem, you first need to figure out what numbers you need to be adding.
• After you understand what you are supposed to do, you should write the addition problem down.  Next, you should draw a picture to help you solve the problem or to show how you solved the problem.
• For each of the three word problems, make sure that you write down the addition problem and then draw a picture.  When you are done, we will go over all of the answers.
• Does anyone have any questions?

Feedback:

Say:

• Who would like to share your answers?  (Allow the students to share.)

Related lessons:

Emergency Sub Plan: Life-cycle - Writing

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Emergency Sub Plan: Life-cycle - Math

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Written by Kimberly Greacen, Education World® Contributing Writer

Kimberly is an educator with extensive experience in curriculum writing and developing instructional materials to align with Common Core State Standards and Bloom's Taxonomy.