Learn how ice was harvested from the Illinois River system and distributed for home use before the invention of commercial refrigeration.

At first, the back room of plant physiologist Edgar Spalding's lab at the University of Wisconsin-Madison might be mistaken for an alien space ship set straight out of a Hollywood movie. It's a room bathed in low-red light with camera...

As the world figures out how to live with a rapidly changing climate, traditional knowledge from indigenous cultures could help us understand just how things are transforming.

A New York City-based startup that plans to create rocket fuel from carbon dioxide has released concept images showing what a refueling station for rockets on Mars could look like <br/>

This animated math video lesson is all about numbers 1 - 10,000. Students will love this engaging and interactive video that takes them step-by-step on how to analyze and interact with numbers in a fun way.

Selective breeding is also known as artificial selection. It is the process by which humans breed plants and animals for particular genetic characteristics. We have been doing this for thousands of years - ever since we first bred food...

The video is a lesson on how to compare numbers using the symbols less than, greater than, and equal to. It covers the importance of understanding the value of each digit based on its place within the number using a place value chart....

Ten years ago this week Kosovo became Europe's newest country. The seeds of its independence lie in the disintegration of Yugoslavia in the 1990s—a brutal series of wars that stirred up age-old nationalism and pitted neighbour against...

This song teaches the Chinese Dynasties for the AP history test

The Solar and Heliospheric Observatory, a joint mission between ESA (the European Space Agency) and NASA, was not designed to find comets — its original goal was to study the Sun from its deep core to the outer layers...

Thirty years ago peaceful protests for democratic reform quickly turned violent as Chinese armed forces turned their weapons against unarmed demonstrators. <br/>

This video is an educational lesson on place value and comparing the value of digits in a whole number. The instructor explains the concept of place value and how each digit's position in a number affects its value. Through the use of...

Learn how to compare two whole numbers using your knowledge of place-value!

Do you need to learn about the place value of numbers in 3rd grade, 4th grade, or 5th grade? This educational kids math video shows upper elementary math students about place value in math! Visually see what ones, tens, hundreds,...

Now that we know about simple sugars, we need to know about how these polymerize to form long polysaccharide chains, like cellulose, starch, and glycogen. Check it out!

The Dust Bowl was one of the worst man-made environmental disasters. It turned the southern Great Plains of the U.S. into a desert. When the native prairie grass was pulled out and replaced with wheat fields, the loose soil had nothing...

Magnets are highly misunderstood, and often interpreted as magic. But they're not magic! It's just science. Let's learn about what magnets are and what produces magnetism so that we can sound super smart at dinner parties, yes?

This program serves as an introduction to resource sustainability, focusing on the key strategies of resource efficiency, recycling, reusing, and reducing. The long-term impacts of resource use on human health and the environment are...

The main feature of the Ngorongoro Conservation Authority is the Ngorongoro Crater, the world's largest inactive, intact and unfilled volcanic caldera. The crater, which formed when a large volcano exploded and collapsed on itself two to...

A brief history of geocentric and heliocentric solar system models are discussed. Kepler's first law is defined. How to draw an ellipse is demonstrated. Planet eccentricities are discussed. This is an AP Physics C: Mechanics...

Scientists are studying coral reefs around the world to discover the impact that warmer temperatures and increased carbon dioxide may have on the life cycle of corals.<b<br/>r/>

Provided by the National Science Foundation & NBC Learn

In this video, students learn how to determine the value of a digit in the thousandths place using a place value chart. The teacher explains the concept of decimal place value and demonstrates how to calculate the value of each digit in...

In this video, we learn about the processes of weathering and erosion that have shaped the Earth's surface over thousands of years. The video highlights the power of water in wearing down rocks and the ability of glaciers to erode large...

In this video I explain economic development and the The Demographic Transition Model (DTM). Which shows how three things change over time: the birth rate, the death rate, and the total population. To give it some context, I focus on the...