Division as Equal Sharing and Grouping
Objectives
Students will understand division as the process of splitting a number into equal groups.[br]Students will apply division to real-world problems using GeoGebra.[br]
Standards:
NJSLS-2.OA.A.1: Use addition and subtraction within 100 to solve one- and two-step problems involving equal group situations, arrays, and number lines.NJSLS-2.OA.C.3: Determine whether a group of objects has an even or odd number of elements and can be divided into equal groups.[br][br]
Introduction:
Imagine you have 12 pencils and 4 friends. How can you share the pencils so that everyone gets the same amount? Demonstrate this by physically dividing 12 pencils into 4 equal groups, encouraging students to observe the process. Through discussion, students will recognize that division is about making equal groups.Using visual aids like counters, drawings, and arrays, I will model several division problems to build conceptual understanding before transitioning into hands-on activities.[br]
Activate prior knowledge and set the stage for the lesson.
[br][b][br][list][*]Question: "How many eggs are in each group when we divide 12 into 4 groups?" [b][list][*]Discuss the result in the class.[br][/*][/list][/b][/*][/list][/b][br]
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12 ÷ 4=
EDP Integration
[*][b]Ask:[/b] [i]“How can we divide objects fairly?[/i][/*][*][b]Imagine & Plan:[/b] Students [b]predict and test different ways[/b] to divide objects.[/*][*][b]Create:[/b] Use [b]counters and arrays[/b] to show division.[/*][*][b]Improve:[/b] Compare different methods and discuss the most efficient ways.[/*]
Exploration Task:
You have 20 apples divided into 2, 4, or 5 groups.[br][br][br]
How many apples in each group when you divide into 2, 4 and 5 groups?
2 groups of ?[br]4 groups of?[br]5 groups of?
Higher-Order Thinking Question
[b]If you divide 18 apples into 3 groups, how many apples are in each group?[/b]
Open-Ended Question
[b] What happens when we divide 20 apples into 10 groups?[/b]
Now that we know how division works, let’s watch a short video to see how it’s used in everyday life.
PRACTICE (use counters as needed)
There are 16 cookies. You need to share them equally between 4 friends. How many cookies does each friend get?
You have 20 pencils. You want to divide them into 5 groups. How many pencils are in each group?
[b] [br][/b]
There are 15 toys. You want to divide them into 3 groups. How many toys are in each group?
Closure & Exit Ticket:
[b][list][*]Review the division process by discussing equal sharing and grouping.[/*][*]"If you have 14 cookies and want to share them equally with a friend, how many cookies will each person get?"[/*][/list][/b]