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Create a 3rd grade lesson plan for this objective: M.3.1

 

Create a 3rd grade lesson plan for this objective: M.3.1 "Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each (e.g., describe context in which a total number of objects can be expressed as 5 × 7)"

Lesson Plan: Multiplying to Make Groups (M.3.1)

Grade Level: 3rd Grade

Subject: Mathematics

Objective: Interpret products of whole numbers, specifically 5 x 7, as the total number of objects in 5 groups of 7 objects each.

Materials:

  • Large colorful squares (5 colors x 7 of each color)
  • Construction paper or butcher paper
  • Markers or crayons
  • Dice (optional)
  • Picture books featuring multiplication (optional)

Procedure:

Engage (10 minutes):

  • Begin by asking students if they have ever collected something, like stickers or marbles. What happens when they put their collection in groups? Have them share examples.
  • Introduce the concept of multiplication as "making groups." Explain that multiplying two numbers, like 5 x 7, means making 5 groups of 7 things each.
  • Read a picture book about multiplication, if desired. Choose one that emphasizes making groups (e.g., "A Pizza, a Pie, a Perfect Piece" by Sarah Weeks).

Explore (20 minutes):

  1. Concrete representation:

    • Show the large squares to the students, and explain that you have 5 different colors.
    • Count out 7 squares of one color and group them together. Ask, "How many squares are in this group?" (7)
    • Take another color and repeat, making a second group of 7 squares. Ask, "How many squares do we have now?" (14)
    • Continue making groups of 7 until all squares are used. Ask, "In total, how many squares do we have?" (35)
    • Explain that we got 35 squares by making 5 groups of 7 squares each. This is 5 x 7.
  2. Activity variations:

    • Have students work in pairs or small groups using smaller sets of squares to make their own groups of 7.
    • Use real-life objects like counters or toys instead of squares.
    • Play a quick dice game: Roll the dice to determine the number of objects in each group, then roll again to determine the number of groups. Multiply the two numbers to find the total number of objects.

Explain (15 minutes):

  • Draw a large chart on the paper and label it "5 x 7." Divide the chart into 5 rows and 7 columns.
  • Explain that each box represents one object in a group. As a class, fill in the chart with colorful markers.
  • Discuss how the chart shows the same situation as the squares activity. Each row has 7 objects, and there are 5 rows in total.
  • Introduce the concept of "array" as another way to represent multiplication. Point out that the chart is an array of 5 rows and 7 columns.

Elaborate (20 minutes):

  • Present various contexts where 5 x 7 might be used:
    • A bakery makes 5 trays of muffins, with 7 muffins on each tray. How many muffins do they make in total?
    • A farmer plants 5 rows of seeds, with 7 seeds in each row. How many seeds are planted?
    • A class divides into 5 reading groups, with 7 students in each group. How many students are reading?
  • Have students create their own scenarios where 5 x 7 could be used. They can draw pictures, write stories, or present their ideas to the class.

Evaluate (5 minutes):

  • Have students complete a short exit ticket: Show them a picture or describe a situation involving 5 groups of 7 objects. Ask them to write the multiplication sentence and explain why it represents the situation.
  • Observe students during the activities and answer any questions they have.

Differentiation:

  • For students who need more support, provide them with smaller groups of objects to work with or allow them to use manipulatives.
  • For advanced students, challenge them to find other ways to represent 5 x 7, such as using Legos or drawing arrays with different arrangements.

Extension:

  • Play multiplication games like "Around the World" or "Scoot" to reinforce the concept.
  • Have students solve word problems involving multiplication of whole numbers.
  • Encourage students to find multiplication in their everyday lives and share their discoveries with the class.

Remember: This lesson plan is a guide and can be modified to fit the needs of your students and classroom. Be creative, have fun, and help your students see the magic of multiplication!

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