This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Practice multiplication facts by playing baseball in this fun, third grade math board game.

Use this interactive activity to help your third-grade child develop vocabulary skills and make a flipbook.

Practice multiplication facts and geography at the same time in this fun third grade math card game.

Create clever airplane favors for your child's next birthday party in this fun third grade arts and crafts activity.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Help your fourth grade scientist practice measurement, and make a scrumptious, healthy summer cheesecake in the process!

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

This fun geometry game requires players to use measurement, find perimeter, and draw polygons. It's great for a fourth grade math student!

Build second and third grade writing skills by using pictures to help kids "see" how to use details in their stories.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

Let your child's imagination run wild with this creative third grade arts and crafts activity: make a fanciful costume out of a cardboard box.

Celebrate the 100th day of school by counting and spelling your way to a "$1.00" word in this 3rd grade math and reading game.

Celebrate St. Patrick's Day this year by making your very own lucky pot of (chocolate!) gold in this 3rd grade arts and crafts activity.

Celebrate Earth Day by making colorful animal sculptures using recycled materials from around the house in this 3rd grade arts and crafts activity.

Many kids find themselves especially challenged by writing in third grade. Here's how you can help, using a technique called "storyboarding."

Help your child get ready for back to school with this fun fifth grade activity, which has him creating an "I'm Studying" door sign.

Make a healthy, no-cook salad with some help from your third grade chef - and practice math and measurement while you're at it!

Most parents probably wouldn't mind subtracting 8-9 years off their age. Here's a fun third grade subtraction activity that may do just that.

Tap into your Irish roots by making an adorable leprechaun hat vase for St. Patrick's Day in this 3rd grade arts and crafts activity.

This first grade science activity brings the green grass of early spring inside while teaching your child about the cycles of growth.

This third grade writing activity brings home the lesson: it's not only what you write that's important, but how you write it, too.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Ask your kids to write these one-sentence "Holiday Wishes." Without realizing it, they'll be building third grade Language Arts skills.

A twist on the gingerbread house, this train is made with graham crackers, icing, and candy decorations. A great 2nd-3rd grade holiday arts and crafts activity.

Build your child's math skills with this 2nd-3rd grade activity. Similar to a carnival toss, this egg carton toss game is sure to provide hours of fun.

Help your child learn about the world through this 3rd-4th grade geography activity: start a postcard collection and mark where they came from on a world map.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

Here's a brain-challenging treasure hunt for your third grader, calling upon math skills with money and with decimals!