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Lesson Plan: Plants (Math - GR 1)

plants math lesson

Subject:  Math

Grade: 1

Lesson Objective: To use addition to solve word problems

Common Core StandardCCSS.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.




  • What is addition?  (Allow the students to answer.)



  • Addition is putting two numbers together to get a new number. 
  • For example, you might be planting your vegetable garden.  You plant 4 cucumber plants and 6 bean plants.  You use addition when you add 4 and 6 together to figure out how plants you have in your garden.
  • Addition makes things easier.  Instead of counting every plant in your garden, you just use addition.  Knowing your facts helps you add really quickly. 
  • When figuring out how many plants you have in your garden, you just add 4 and 6  (Write this problem on the board- 4 + 6= 10).
  • If you do not know your addition facts yet, you can add using your fingers, your number line or by drawing a picture.  This is how you can use your fingers to help you add (demonstrate this using the 4 + 6 example). 
  • If you use your number line, you find the first number and then count up however many the second number is.  For example, when adding 4 + 6, you find 4 on the number line and then count 6 more (demonstrate this).
  • To draw a picture, you could draw circles to represent each number.  You would then be able to count the circles to help you get the answer.
  • Today, you are going to be solving word problems.   To solve a word problem, you need to figure out what numbers you need to be adding.  You do this by reading the addition word problem.  The word problem will give you a scenario and there will be a question at the end that uses words such as all together or how many total.  This means that you should add.
  • You should write the addition problem down and draw a picture to help you solve the problem.  When you are done, we will go over all of the answers.  Does anyone have any questions?



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

Related lessons:

Lesson Plan: Plants - Science

Lesson Plan: Plants - Writing

Lesson Plan: Plants - Reading

Lesson Plan: Plants - 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.

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