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Multiple-choice test questions can be confusing. Here's a toolbox of tricks and strategies to help your teen become a multiple-choice master.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

High school students recreate Michael Faraday's experiment in this cool science fair project that induces current in a coil of wire.

Here's a math, science, and social studies activity: help your kindergartener become a "coin archaeologist" by examining how different coins look and feel.

This science fair project idea explores if an LED light can be powered by vegetables and/or fruits.

This science fair project investigates how temperature of a room affects the burn rate of a candle.

This experiment explores how microwave radiation affects fungi, bacteria, and plant life.

Research information on vitamin content in foods, Examine the effect of vitamins, test organic samples of fruits, meats, grains for vitamin content.

Research active ingredients in anti-aging creams. Test skin creams on volunteers, document the effectiveness of the creams with before an after photographs.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

This science fair project idea explores how far the âdanger zoneâ is from different types of caution signs.

This science fair project idea determines the probability of a coin landing heads or tails.

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

Challenge your learner to design and build a city of their own in this creative engineering activity.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

This science fair project idea explores whether the color of surroundings affects human mood.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

In this experiment, recycled objects are separated to demonstrate how mixtures are made and the variance in the physical properties of their ingredients.

Determine the effect of reading aloud on memory skills. Prepare a list of randomly chosen words, ask volunteers to recall as many as possible from the list.