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Intro to Counting in Groups (Arrays)
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What you will learn from this videoWhat you will learn
- We'll learn how to count in GROUPS.
- We will also learn that we can organize things into equal rows to make them easier to count.
- And we’ll explore how this knowledge can help us count how many tennis balls, juice boxes and cupcakes we have!
This video was just released 07/26/2021.
Lesson materials will follow about 1 week later.
- Discussion Questions
Before Video
How can you skip count by 5s?ANSWEREach number is 5 more than the number before it. 5, 10, 15, 20, 25, etc.
Each number is 10 more than the number before it. 10, 20, 30, 40, etc.
When you skip count by 5s, you add 5 each time.
I add the first two together. Then I add the last number to the sum.
12
After Video
What is repeated addition?ANSWERRepeated addition is adding the same number over and over again. For example, 3 + 3 + 3 + 3 is repeated addition.
A row is a group of objects in a line. Rows go left and right.
An array is a group of equal rows that are lined up.
There are 4 dots in each row. Add 4 + 4 + 4 = 12.
Add 5 + 5 = 10.
- Vocabulary
- Skip counting DEFINE
Counting on by amounts greater than 1.
- Equal Groups DEFINE
Groups with the same number of items.
- Addition DEFINE
Putting parts together to find a new total.
- Repeated addition DEFINE
Adding equal groups repeatedly, which means adding the same number again and again.
- Row DEFINE
A line of items. Rows go left and right.
- Column DEFINE
A line of items. Columns go up and down.
- Array DEFINE
Items lined up in equal rows.
- Skip counting DEFINE
- Practice Word Problems
- Practice Number Problems
- Lesson Plan
- Teacher Guide
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Level 1
[Draw an array with 3 rows of 2 dots each on the board.] How many dots are in each row?
Level 2
Count by 2s to find how many dots there are in all.
Level 3
Write an addition equation using repeated addition to show how many dots there are.
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