How about some hamburgers? Kids can trace number 20, and practice their counting skills with up to 20 hamburgers!

Numbers 1-20 can be as easy as 1-2-3! Assess your students’ understanding of numbers 1 to 20 using this handy worksheet.

Assess your students’ understanding of subtraction by having them solve subtraction problems within 20.

Find the number 20 among this brood of turkeys down on the farm!

Add it up! Assess your students’ understanding of addition by having them solve addition problems within 20.

This resource will help assess your students' understanding of numbers 1-20.

Adding numbers within 20 is as easy as counting balloons with this colorful and simple worksheet.

Use this glossary with the EL Support Lesson Plan: Adding Within 20.

Gain expertise with addition sentences within 20 in this helpful math worksheet!

Use this number line as a tool to practice adding and subtracting within 20.

Can your kid help mama bird reach her babies? As he follows the path from one to 20, he'll get more comfortable counting to 20 and have fun while he's at it.

Children can practice counting, ordering, and identifying numbers 1 to 20 with this set of number cards.

Use these vocabulary cards with the EL Support Lesson Plan: Adding Within 20.

Does your little mathematician enjoy the pop of a good balloon? In this sheet, he'll 'pop' balloons that contain addition or subtraction problems that equal 20.

Use this assessment worksheet to determine students’ ability to order numbers from 0 to 20.

Kids color and count teacups with the number 20 on this kindergarten math worksheet, which offers practice recognizing and writing whole numbers and counting.

It's time to check those addition skills! Use this to assess your student’s abilities to add within 20.

Let's check in on those subtraction skills! Use this math worksheet to assess your students’ understanding of subtraction by having them solve subtraction problems within 20.

Subtract numbers within 20 using ten frames with this first-grade math worksheet!

Is your child ready for a parade of practice activities? He'll have some brightly colored fun as he explores writing and recognizing numbers 11-20.

Master subtraction under 20 with this bright, inviting practice sheet!

It's time to check in on those addition skills! Use this math activity to assess your students’ understanding of addition by having them solve addition problems within 20.

Master the math of making 10 and 20 with two addends in this helpful addition worksheet!

Add numbers within 20 using ten frames with this first-grade math worksheet!

Invite your first grader to enter the world of the teen numbers as she starts writing 11-20. Practice tracing the name of each number before writing it.

It’s time for sunny subtraction within 20 using number bonds with this engaging worksheet!

So your child has mastered the numbers 1-10 -- what's next? How about a bright and colorful number pyramid that challenges them to tackle numbers 11-20?

It's time to check in on those subtraction skills! Use this to assess your student’s abilities to subtract within 20.

Use this number line template to give your young mathematicians practice with identifying, counting, and ordering numbers from 0-20.

Practice finding missing numbers while adding within 20 using ten frames!