Sharing Fairly: Making Equal Groups!

Math Grades 1st Grade 6:10 Video
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Lesson Description

Learn how to divide objects into equal groups using different strategies like drawing, skip counting, and arrays. Understand division sentences and how they relate to multiplication.

Video Resource

BrainpopJr Making Equal Groups

Fred Muraview

Duration: 6:10
Watch on YouTube

Key Concepts

  • Equal groups
  • Arrays
  • Skip counting
  • Division sentences
  • Fact families

Learning Objectives

  • Students will be able to divide a set of objects into equal groups.
  • Students will be able to use arrays to represent equal groups.
  • Students will be able to use skip counting to solve division problems.
  • Students will be able to write a division sentence to represent a division problem.
  • Students will be able to identify the relationship between division and multiplication within fact families.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students if they have ever had to share something with their friends or family. Discuss what it means to share fairly and why it's important. Introduce the term 'equal groups'.
  • Video Viewing (5 mins)
    Watch the BrainPopJr. video 'Making Equal Groups'. Encourage students to pay attention to the different ways Moby and Annie share their marbles and cookies.
  • Discussion (5 mins)
    After the video, discuss the different strategies presented in the video for making equal groups: drawing, arrays, and skip counting.
  • Activity 1: Sharing with Drawings (10 mins)
    Give each student a worksheet with simple division problems (e.g., 8 stickers shared between 2 friends). Have them draw pictures to show how they would divide the objects into equal groups.
  • Activity 2: Array Building (10 mins)
    Provide students with small manipulatives (e.g., cubes, counters). Present division problems and have them build arrays to represent the equal groups. For example, 12 cookies shared among 3 people would be represented by an array with 3 rows and 4 columns.
  • Activity 3: Skip Counting (10 mins)
    Use a number line or hundreds chart. Present division problems that can be solved with skip counting (e.g., 10 students divided into groups of 2). Guide students to skip count by the group size until they reach the total number of items and then count how many skips they made.
  • Wrap-up (5 mins)
    Review the key concepts of equal groups, arrays, skip counting, and division sentences. Emphasize the connection between division and sharing fairly.

Interactive Exercises

  • Sharing Stickers
    Give students a set of stickers and have them physically divide them among a group of friends (real or imagined), ensuring each person gets an equal amount.
  • Building Arrays with Blocks
    Provide students with blocks and ask them to build arrays to represent different division problems. For example, 'Build an array to show 15 apples shared among 5 friends.'

Discussion Questions

  • What does it mean to share fairly?
  • What are some different ways we can make sure everyone gets the same amount?
  • How can drawing help us divide things into equal groups?
  • How can we use arrays to show equal groups?
  • How does skip counting help us divide?
  • What is a division sentence?

Skills Developed

  • Problem-solving
  • Critical thinking
  • Visual representation
  • Mathematical reasoning

Multiple Choice Questions

Question 1:

What does it mean to have equal groups?

Correct Answer: Each group has the same number of things.

Question 2:

If you have 6 cookies and want to share them equally with 2 friends, how many cookies does each friend get?

Correct Answer: 3

Question 3:

What is something that can help you share equally?

Correct Answer: All of the above

Question 4:

What is an array?

Correct Answer: A set of equal groups in rows and columns.

Question 5:

If you have 10 fingers and want to make groups of 2, how many groups can you make?

Correct Answer: 5

Question 6:

What is it called when you split a big group into smaller equal groups?

Correct Answer: Division

Question 7:

If 12 divided by 3 is 4, which number is the big group?

Correct Answer: 12

Question 8:

If you have 15 marbles and 5 friends, how many marbles does each friend get if you share equally?

Correct Answer: 3

Question 9:

What is a fact family?

Correct Answer: A set of numbers that are related with multiplication and division

Question 10:

If you are skip counting by twos, what number comes after 4?

Correct Answer: 6

Fill in the Blank Questions

Question 1:

When groups are ______, they each have the same number of things.

Correct Answer: equal

Question 2:

An ______ is a set that shows equal groups in rows and columns.

Correct Answer: array

Question 3:

We can use ______ ______ to help divide items into equal groups.

Correct Answer: skip counting

Question 4:

When you divide, you split a larger group into smaller ______ groups.

Correct Answer: equal

Question 5:

Division is an ______ just like addition, subtraction, and multiplication.

Correct Answer: operation

Question 6:

The division symbol tells you to ______.

Correct Answer: divide

Question 7:

In a division sentence, the ______ number goes inside the little house.

Correct Answer: bigger

Question 8:

15 divided by 3 is equal to ______.

Correct Answer: 5

Question 9:

Multiplication and division facts use numbers in the same ______ ______.

Correct Answer: fact family

Question 10:

5 times 3 is equal to ______.

Correct Answer: 15

Educational Standards

CCSS.Math.Content.1.OA.A.1:Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. CCSS.Math.Content.1.OA.C.5:Relate counting to addition and subtraction (e.g., by counting on 2 to add 2). CCSS.Math.Content.1.OA.D.8:Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.

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