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Skills Covered

  • Classify numbers as odd or even
  • Sort numbers into categories
  • Write numerals in organized columns
  • Recognize odd and even patterns
  • Build logical thinking skills
  • Strengthen number sense within 20

How to Use These Worksheets

Students read each number and write it in the correct column - Odd or Even. Practice classifying numbers within 20 as odd or even.

In the Classroom

Use for math centers or independent practice. Encourage students to explain their reasoning as they sort each number into the correct column.

At Home

Practice sorting household items into pairs. If all items pair up evenly, the count is even. If one is left over, the count is odd.

Tips for Success

  • Try dividing the number by 2 - if it divides evenly, it is even
  • Check your last digit to decide quickly
  • Use the answer key for self-checking

Common Core Standards Alignment

These worksheets support the following Common Core State Standards for Mathematics:

  • 2.OA.C.3 Decide if up to 20 objects are odd or even (match them in twos or skip count by 2s); write evens as doubles.

© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

Odd & Even: Sort into Columns

1st – 2nd Grade

Sort numbers into odd and even columns. Practice classifying numbers within 20 as odd or even.

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What’s Included

  • 6 unique sorting worksheets
  • Numbers within 1-20
  • Two-column odd/even format
  • Multiple numbers per page
  • Answer keys included
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