Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Put your young paleontologist's puzzle-solving skills to the test by having her hunt for dinosaur bones and then assemble them to create dinosaur skeletons.

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

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

Liven up a lesson about graphing by helping your third grader compile a bar graph from his classmates' birthday data.

This science fair project investigates why the number of visible stars changes from place to place.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Compare fractions in this two-player math game. The objective of the games is to work together to determine who has created the largest fraction.

This science fair project idea observes products available in the school cafeteria and waste produced by these products.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Analyze this simple betting game with your fourth grade student in order to discuss probability.