How many sides does a triangle have? Three! Sort shapes that have three sides and shapes that don't have three sides with this wacky worksheet.

Several people in this worksheet are part of a club. Help your child identify what the club kids have in common!

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

Preschoolers are full of observations about the world around them. Get your child to apply what he knows by having him figure out what doesn't belong on a desk.

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

Help your child sort these kids using counting and classifying skills. Your child will count, and learn to group and identify by characteristics.

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.

This worksheet is full of delicious and nutritious snacks, but there are a few things that don't belong!

Help your preschooler wrap her head around nighttime and daytime objects with this cute categorization worksheet.