# 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.

**3 Videos to Help You Teach Common Core Standard: 1.NBT.1**

**Video 1: Counting from Any Number to 120**

Counting for Kids Up To 100 - Starting At Any Number | Math for 1st Grade | Kids Academy - YouTube

[Counting for Kids Up To 100 - Starting At Any Number | Math for 1st Grade | Kids Academy](https://www.youtube.com/watch?v=r_h7YMgMdao)

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
   - First counts from 9 to 20 to learn the pattern.
   - Then counts 109 to 120 following that pattern.
2. 104 to 120
   - Provides time to pause the video and practice and answer when students are ready.
   - 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**

Read and Write Numbers up to 120 - First Grade Math (1.NBT.1.S1-S3) - YouTube

[Read and Write Numbers up to 120 - First Grade Math (1.NBT.1.S1-S3)](https://www.youtube.com/watch?v=R2PKc7Ch6Mo)

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
   - The video points out that numbers end with “teen.”
3. Twenty-Ninety
   - 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
   - Since 7 is in the tens place, it is seventy.
   - Since 6 is in the ones place, it is six.
   - Adding the numbers together creates seventy-six.
2. 39 = thirty-nine
   - The above method is followed here as well.

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

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

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

**Video 3: Counting Objects up to 120**

Counting Up to 120 - First Grade Math (1.NBT.1.S4-S6) - YouTube

[Counting Up to 120 - First Grade Math (1.NBT.1.S4-S6)](https://www.youtube.com/watch?v=8960hE0Vgic)

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

*Information on standards is gathered from The New Mexico Public Education Department's [New Mexico Instructional Scope for Mathematics](https://webnew.ped.state.nm.us/bureaus/curriculum-instruction/nmis-mathematics/) and the [Common Core](http://www.corestandards.org/) website.