Counting Big Groups: Let's Count by Tens!

Math Grades 1st Grade 5:53 Video
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Lesson Description

Learn how to count large groups of objects quickly and easily by grouping them into tens and ones. Just like in the video, we'll use fun objects to practice counting!

Video Resource

Grade1: Math Lesson # 84 Counting Large Collections, Grouping By 10's And 1's

The Eagle's Nest - Our Online Classroom

Duration: 5:53
Watch on YouTube

Key Concepts

  • Grouping objects into tens
  • Counting by tens
  • Understanding place value (tens and ones)

Learning Objectives

  • Students will be able to group a collection of objects into sets of ten.
  • Students will be able to count by tens to determine the total number of objects.
  • Students will be able to identify the number of tens and ones in a two-digit number.

Educator Instructions

  • Introduction (5 mins)
    Begin by showing students a jar or bowl filled with a collection of small objects (e.g., buttons, beads, small toys). Ask them to estimate how many objects are in the jar. Explain that it's hard to count when they are all mixed up. Tell them that the video will show us an easier way to count!
  • Video Viewing (7 mins)
    Play the YouTube video: Grade1: Math Lesson # 84 Counting Large Collections, Grouping By 10's And 1's. Encourage students to follow along as the teacher in the video groups and counts the gems.
  • Guided Practice (10 mins)
    After the video, provide each student with a collection of objects (around 30-50). Guide them to group the objects into sets of ten. Have them count the groups of ten and then count any remaining ones. Write the corresponding number on the board, emphasizing the tens and ones place.
  • Independent Practice (8 mins)
    Have students work independently to count a different collection of objects by grouping them into tens and ones. They should record their work on a worksheet (see interactive exercises).
  • Wrap-up (5 mins)
    Review the concept of counting by tens and ones. Ask students to share their strategies and any challenges they encountered. Praise their efforts and emphasize the importance of organization in counting.

Interactive Exercises

  • Counting Worksheet
    Create a worksheet with several collections of objects (represented by drawings). Students should circle groups of ten, count the groups, and write the total number of objects, indicating the number of tens and ones.

Discussion Questions

  • Why is it easier to count objects when they are in groups of ten?
  • Can you think of other things we can count by tens?
  • What happens if we don't have enough to make a full group of ten?

Skills Developed

  • Counting skills
  • Grouping and organization
  • Place value understanding

Multiple Choice Questions

Question 1:

Which group is made of 10?

Correct Answer: 🍎🍎🍎🍎🍎🍎🍎🍎🍎🍎

Question 2:

How many is 10 + 10?

Correct Answer: 20

Question 3:

If you have 2 groups of ten, how many do you have?

Correct Answer: 20

Question 4:

What number has 3 tens and 0 ones?

Correct Answer: 30

Question 5:

Which shows counting by tens?

Correct Answer: 10, 20, 30, 40

Question 6:

How many 'ones' are in the number 23?

Correct Answer: 3

Question 7:

What is the number 10 more than 40?

Correct Answer: 50

Question 8:

Which number is made of 1 ten and 5 ones?

Correct Answer: 15

Question 9:

If you have 10 cookies and you eat 2, how many groups of ten cookies do you have?

Correct Answer: 1

Question 10:

If you have 6 groups of ten, how many do you have in total?

Correct Answer: 60

Fill in the Blank Questions

Question 1:

Ten little monkeys make a group of ____.

Correct Answer: ten

Question 2:

When counting by tens we say 10, 20, ____.

Correct Answer: 30

Question 3:

The number 42 has 4 ____ and 2 ones.

Correct Answer: tens

Question 4:

Sixty can also be written as ____ tens.

Correct Answer: 6

Question 5:

The number 100 has ten _____.

Correct Answer: tens

Question 6:

If you group 20 blocks into groups of ten, you'll have ____ groups.

Correct Answer: 2

Question 7:

If you have 3 groups of ten and 5 leftover, you have ____ in all.

Correct Answer: 35

Question 8:

The number 70 is made up of ____ tens and 0 ones.

Correct Answer: 7

Question 9:

Counting by tens is faster than counting by ____.

Correct Answer: ones

Question 10:

When we count large groups, we make counting by ____ easier.

Correct Answer: tens

Educational Standards

1.NBT.B.2:Understand that the two digits of a two-digit number represent amounts of tens and ones. 1.NBT.A.1:Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral. CCSS.Math.Content.1.OA.C.5:Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

Teaching Materials

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