Numbers 10 to 20


Numbers 10 to 20 teaches students to recognize the numbers 10 through 20. Students will learn how to sequence the numbers by their value and decompose them into tens and ones. They will also practice writing these numbers numerically and in written format.

The “Options for Lesson” section on the teachers guide provides additional ideas for the lesson. Using a calendar and counting aloud each day in a month is a great way to reinforce two-digit numbers. Writing birthdays in the format of mm/dd/yy is another fun way for students to recognize numbers.

Buy Now For $1.95


What our Numbers 10 to 20 lesson plan includes

Lesson Objectives and Overview: Numbers 10 to 20 teaches students to recognize the numbers 10 through 20. Students will sequence the numbers by value. They will decompose two-digit numbers into tens and ones. Finally, students will fluently write numbers (in both the numeric and written formats) from 0 to 20. This lesson is for students in 1st grade and 2nd grade.

Classroom Procedure

Every lesson plan provides you with a classroom procedure page that outlines a step-by-step guide to follow. You do not have to follow the guide exactly. The guide helps you organize the lesson and details when to hand out worksheets. It also lists information in the yellow box that you might find useful. You will find the lesson objectives, state standards, and number of class sessions the lesson should take to complete in this area. In addition, it describes the supplies you will need as well as what and how you need to prepare beforehand. This lesson requires colored writing utensils.

Options for Lesson

You can take advantage of the suggestions in the “Options for Lesson” section that offers additional activities or ideas to incorporate into the lesson plan. By kindergarten and first grade, students should be familiar with single-digit numbers. Using a calendar and counting aloud each day in a month is a great way to reinforce two-digit numbers. Writing birthdays in the format of mm/dd/yy is another fun way for students to recognize numbers. Whether counting steps to the media center, the number of windows in a building, or pages in a book, incorporating counting in daily experiences reinforces the basic numerical concepts students need to acquire to be good math students.

Teacher Notes

The paragraph on this page gives you a little more information on the lesson overall and describes what you may want to focus your teaching on. It explains that students often have difficulty with abstract concepts of place and place value. This lesson aims to help them advance toward these concepts even though it does not focus primarily on addressing place and place value. The blank lines are available for you to write out any thoughts or ideas you have as you prepare.


The Numbers 10 to 20 lesson plan contains four content pages. In an effort to help students engage with the content, these pages are interactive. The first page introduces students to the written format of numbers 1 to 10. Students will then spell out those numbers in the box on at the top of the page. Next, they will count stars (10 total stars) and answer the questions below.

On second page, students will count more stars (this time 20). They will read aloud numbers 1 to 20 then spell them out on the dotted lines at the bottom of the page. This will provide them practice in recognizing the numbers in order and in both numerical and written formats.

The third page prompts students to count backward from 20 to 0. At this point, the lesson moves into place and place value. Students will count squares (15 squares) and circle 10 of them, then the remaining 5. They will see that there is a 1 in the left box and a 5 in the right box. The 1 represents 10 in the tens place and the 5 represents 5 in the ones place to make 15.

Students will look at the numbers 10 to 20 and write them in the boxes at the bottom of the page. On the final page, they will look at the number 9 as 09 in the boxes. There are 0 tens and 9 ones. Again they will count squares (10 squares), write that number in the boxes, then write it as a word. Finally, they will draw 11 or more shapes of their choice in the box at the bottom of the page. They will spell the number of shapes they drew and write it numerically in the boxes.


The Numbers 10 to 20 lesson plan includes three worksheets: an activity worksheet, a practice worksheet, and a homework assignment. Each one will reinforce students’ comprehension of lesson material in different ways and help them demonstrate when they learned. Use the guidelines on the classroom procedure page to determine when to distribute each worksheet to the class.


For the activity, students will cut out the 10 digits at the top of the page. They will see how many numbers they can make that are greater than nine and write each one in the box. Then they will draw 20 shapes at the bottom of the page and describe how many tens there are an how many ones.


The practice worksheet requires students to write, spell out, or draw numbers. There are three columns, one for numerical values, one for numbers spelled out, and one for shapes. Whichever columns are empty, students must write, spell, or draw in shapes for that number.

For instance, the first row has 12 in the numerical column. So students will spell out the number 12 and then draw 12 shapes. The third row has 15 triangles, so students will write 15 and spell out the number 15.


Students will cut out all the numbers 0 through 20 and put them in the correct order. Then they will paste them on a separate sheet of paper.

Worksheet Answer Keys

The final page of the lesson plan document is an answer key for the practice worksheet. Correct answers are in red to make it easy to compare them to your students’ responses. If you choose to administer the lesson pages to your students via PDF, you will need to save a new file that omits this page. Otherwise, you can simply print out the applicable pages and keep this as reference for yourself when grading assignments.

Additional information


Kindergarten, 1st Grade



State Educational Standards