# Extending the Counting Sequence

Learning to extend the counting sequence and start from any number is a first grade, Common Core math skill: 1.NBT.1. Below we show three videos that demonstrate this standard. Then, we provide a breakdown of the specific steps in the videos to help you teach your class.

Prior Learnings

Your students should be familiar with counting from 1 to 100 using 1’s and 10’s, starting from any number. They should also be able to read, write, and represent objects using numbers between 0 and 20 (K.CC.1-3).

Future Learnings

Later on, understanding place values will enable your students to skip-count within 1000 (counting by 5’s, 10’s, and 100’s). They will also be able to read and write numbers by using “base ten numerals, number names, and expanded form” (2.NBT.1-3).

Common Core Standard: 1.NBT.1 - Learn how to read, write, and count numbers up to 120

Students who understand this principle can:

1. Count to 120.
2. Start at any number and count to 120.
3. Read any number name up to 120.
4. Write any numeral up to 120.
5. Label a set of objects up to 120 with a written numeral.

Video 1: Counting from Any Number to 120

This video shows students how to use like-patterns in counting to higher numbers. The video starts by explaining that when you count from 100 to 120, you can use the same counting pattern you used from 0 to 20.

As long as you remember the pattern, you can start counting from any number in the sequence.

1. The video shows how to count from 7 to 20.
2. It then shows how to count from 107 to 120.
3. It explains that counting from 0 to 20 is very similar to counting 100 to 120.

If students realize that the pattern repeats itself, they can then use that knowledge to begin counting from any number between 0 and 120.

The video gives a few more practice examples so students can better understand the pattern and how to count up to 120 from any lower number.

1. 109 to 120
a. First counts from 9 to 20 to learn the pattern.
b. Then counts 109 to 120 following that pattern.
2. 104 to 120
a. Provides time to pause the video and practice and answer when students are ready.
b. The video first counts from 4 to 20 and then 104 to 120.

The video reminds students that they can use patterns to start counting from any number and end at 120.

Video 2: Reading and Writing Numbers up to 120

The video starts by introducing the topic: reading and writing numbers up to 120. It then reviews how to write the basic numbers 1-20.

1. Reviews one-nine
2. Reviews ten-nineteen
a. The video points out that numbers end with “teen.”
3. Twenty-Ninety
a. The numbers all end with “ty.”

Next, the video provides some practice problems for students to apply what they have learned and write numbers in their word form.

1. 76 = seventy-six
a. Since 7 is in the tens place, it is seventy.
b. Since 6 is in the ones place, it is six.
c. Adding the numbers together creates seventy-six.
2. 39 = thirty-nine
a. The above method is followed here as well.

After, the video practices writing spelled-out numbers in their numeral form.

1. Twenty-seven
a. Twenty = 20
b. Seven = 7
c. 20 + 7 = 27
2. Fifty-two
a. Fifty = 50
b. Two = 2
c. 50 + 2 = 52

The video then congratulates students on a job well done and ends.

Video 3: Counting Objects up to 120

The video starts with some simple counting practice. Boddle asks students to count the trees and the flowers.

1. There are 5 trees.
2. There are 8 flowers.

Next, Boddle counts some pens and stars, showing students a counting trick.

1. There are two rows of 10 pens and 3 extra.
a. 2 tens is equal to 20.
b. 20 + 3 = 23 pens
2. There are seven rows of 10 stars and 5 extra.
a. 7 tens is equal to 70.
b. 70 + 5 = 75 stars.

After, Boddle introduces more of a challenge by having students count a lot of paperclips.

1. There are ten rows of 10 paperclips and 4 extra.
2. 10 tens is equal to 100.
3. 100 + 4 = 104.

The video ends by reminding students that the key to counting large numbers is counting groups of 10.

Want more practice?