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

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

This worksheet offers fun practice for students as they learn to identify and count numbers 1 to 20.

What's Rapunzel trapped within? Find out by connecting the dots from 1 to 20. Kids also give their fine motor skills a boost while they work.

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

Practice counting 1-20 with this fun worksheet, which challenges your child to count the steps to the circus in sequence.

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

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

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.

Introduce readers to the poem “When I Was One-and-Twenty” by English poet A. E. Housman with this sixth-grade worksheet! 

Practice one- and two-digit division facts with this 20-problem 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?

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.

Learners will take on 20 one-digit addition problems in this sweet springtime worksheet.

Can you figure out what I'm thinking of in 20 questions or less? Step up to the challenge with a ready-to-print scorecard for this classic logic game!

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!

This preschool math and coloring worksheet focuses on the number 20. Kids color all of the spaces with the number 20 to reveal a hidden sock picture.

Find out if students can count to 20 and help them identify areas of improvement in this counting assessment worksheet.

In this worksheet, “monkeying around” will help you master counting to 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 these vocabulary cards with the EL Support Lesson Plan: Adding Within 20.

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

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

Take a deep dive into prime and composite numbers to 20 with this exploratory worksheet!

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

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