Laminate and display this puzzle to encourage students to think deeply about how each group of circles is the same and different. This works as a great hook when introducing the concept of odd and even numbers.

Welcome to the laboratory. Here your child can count and color as they decide if these numbers are odds or evens.

Here's a fun and colorful way to teach your second grader important concepts: subtraction and odd/even numbers.

Here's great practice for odd and even numbers that are below 100. Students count and color as they get familiar with identifying odds and evens.

In this Halloween maze, follow the even numbers out of this scary graveyard. But watch out -- there are odd numbers waiting to trip you up!

Give your second grader extra practice with both subtraction and determining which numbers are odd and even with this colorful worksheet!

Help your second grader determine whether numbers are odd or even with this bright, engaging game board. Practice counting and number sense, too!

Students review odd and even numbers by circling them, then counting up how many they find.

Boost your second grader's math skills without boring him! Challenge him to solve seven subtraction problems, and then identify which answers are odd and even.

Don't let your second grader's math practice go to waste! This double-digit subtraction exercise also challenges her to identify odd and even numbers.

This second grade math practice worksheet is a double whammy. She'll solve each subtraction problem, and then determine whether the answers are odd or even.