An estuary is a place where water from a river mixes with water from an ocean. Estuary plants nee...

Did you know that botanists have named approximately 400,000 flowering plant species? Plants have...

All living things on Earth must eat something in order to survive. Most plants use photosynthesis...

Approximately 99 percent of all the electricity in Norway comes from hydropower. There are close ...

Did you know that people in small towns often walk where they need to go? They do not need to dri...

The simplest machines are the lever, wheel and axle, pulley, ramp, and screw. The electric motor ...

Florida produces the most citrus fruit of any state in the United States. Besides oranges, the st...

Many governments around the world are encouraging the use of conservation agriculture. Simple tec...

A persuasive paragraph is a group of sentences used to convince someone to believe or do somethin...

Table salt is a type of crystal that people use every day. The smallest crystal in the world is m...

Wedges are used to separate objects. Some types of wedges, such as chisels, have been in use for ...

Different tools can be used to measure length. These include rulers, tape measures, and yardstick...

Did you know that sound is only made when objects vibrate? Vibrating objects create sound waves. ...

The frightful tales in R.L. Stine's Goosebumps series have made him one of the world's best-selli...

Did you know that all of the blood in your body moves through the circulatory system? This import...

The Cold War was a conflict between the competing ideologies of communism and capitalism. It came...

Today, many farmers are more like engineers and technicians in high-tech professions than traditi...

After years of conflict and bloodshed, the settlers who first came to Texas in 1820 joined the Un...

Explore the current and future applications of common elements from the periodic table of element...

Each title in the Lightbox Literature Studies series features comprehensive teacher resources, su...

In December 1787, Delaware became the first state to ratify the Constitution. The document went i...

In the early 1770s, many American colonists were growing angry. They disliked the way the British...

Thanksgiving began long ago when Pilgrims from England settled in the New World. As Christians, t...

Did you know that Abraham Lincoln was the 16th president of the United States? He believed in fre...

Lake Superior is the largest of the Great Lakes. It is so large that it holds more water than the...

Politics have always played a role in African American history. African Americans performed polit...

Pyramids

Did you know your body uses energy to move, grow, breathe, and sleep? All living things on Earth ...

Videos are a great way to learn information for projects. A good informational video can bring to...

The Supreme Court, often referred to as the High Court, has powers over all the other courts in t...

Did you know that stratus clouds can cover the sky like a thick gray blanket? Stratus clouds are ...

Of all the prairie states, Indiana is the farthest east. It occupies the smallest area of all the...

From a dark, fizzy drink concocted in a pharmacist's lab, Coca-Cola has grown into a corporation ...

Did you know that Indigenous Peoples' Day honors the history and culture of Indigenous Peoples in...

The West contains at least a part of every single desert in the United States. It includes both t...

Europe covers an area of nearly 4 million square miles (10.4 million square kilometers). This is ...

Hydroelectricity is the world's largest renewable energy source. The largest U.S. hydroelectric d...

Mars is one of the most visible objects in the night sky. Astronomers believe that Mars was more ...

Mercury is one of only two planets in the solar system without a moon or moons. Some scientists b...

Explore some of the English language's most important literary works in Lightbox Literature Studi...

The Maasai live in an area of about 61,770 square miles (160,000 square kilometers) in southern K...

General Electric made its name generating electric power and making products that need electricit...

The first snowboard was made in 1965, when Sherman Poppen fastened two skis together. Today, snow...

Did you know that there are about 60,000 miles (95,500 kilometers) of blood vessels in the averag...

Ancient Greece had dozens of different states, one of which was Athens. The Athenian system of go...

Did you know that animals make up at least 75 percent of all species on Earth? Animals are multic...

The United States is a world leader in the production of energy. More than 80 percent of the ener...

Floods are natural disasters that result from high water flow that rises too quickly to properly ...