Clock, octopus, starfish, turtle: Which thing does not belong in this group? Kids completing this preschool worksheet identify the object that does not belong.

Circle, cheese, triangle, square: One of these things does not belong in this group. Help your child figure out the outlying object with this worksheet.

In this fun categorizing game, your preschooler decides what belongs in the library. Cut out the pictures and let him cover up the items that don't belong.

Help your child sort and classify an array of fun hats in this categorization worksheet. Your kid will count the number of brown, feathered, or decorated hats.

Kids will sort and classify toys in this categorizing worksheet. Help your child sort toys by type and uses in this toy categorization worksheet.

Count and classify different kinds of vehicles in this worksheet. Kids will identify what vehicles pictured have wheels, can float, or are green.

Is that a one-eyed Octopus with horns? Now, that's odd! See if your second grader can identify the odd numbers in this worksheet.

Your child will use his powers of deduction to count and classify the furniture in this worksheet. Count and classify the furniture pictured with your child.

Your shoe-obsessed child will learn how to count and classify his shoes in this worksheet. Count and classify with your child using these exercises.

In this second-grade math worksheet, your child will color the odd numbers to create a path that leads puppy to its bone.

In this second-grade math worksheet, your child will circle the even numbers to create a path that leads Mr. Frog to the lotus flower.

Help your students determine if a shape is regular or irregular!

What is the name of this shape? Is it a parallelogram or square? Teach your students to classify two-dimensional shapes using a Venn diagram.

Use this handy worksheet to help your students review those tricky polygons!

Help your students identify the differences between regular and irregular polygons!

Strengthen your child's geometry skills with this printable worksheet. Use this resource with your students to classify two-dimensional shapes like parallelograms, quadrilaterals, squares, and triangles.

Fifth graders review types of angles, triangles, and polygons in this handy geometry review.

Challenge your third grader to identify acute, right, and obtuse angles with this geometry worksheet.

Use this one-page handout to help students solidify their understanding of the real number system!

In this 3rd grade geometry worksheet, your child will complete each polygon using a ruler, then identify what type of polygon it is.

In this second-grade math worksheet, your child will practice writing even numbers and counting by 2 from 30 to 90 as they write the missing numbers in the spaces.

This worksheet will introduce your child to the three types of triangles: the equilateral triangle, the isosceles triangle and the scalene triangle.

Blossoming foodies will enjoy our gastronomically focused categorization worksheet. Kids will sort food and drink by type in this food categorization worksheet.

In this worksheet, your child will practice identifying shapes and sizes of buttons. Cut them out, and sort them into two distinct categories.

One of the items in each group doesn't belong with the others. Can your child find which ones?