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...

How is a rural community different from a suburban community? What characteristics do cities and suburban areas share? This program explores the similarities and differences that make communities unique. Youngsters visit a variety of...

One type of object that some astronomers study is called a quasar. When these were first discovered, it was a bit confusing as to precisely what they are, which is why quasar stands for quasi-stellar object, since we thought they looked...

This video provides an overview of the different phyla of worms, including flatworms, roundworms, and segmented worms. It explains their characteristics and habitats, such as the microscopic planarians found in water, the tube-like...

Chronicles the exploits of Cortes, De Soto, and Coronado; and Spanish incursions into South & Central America, Mexico and the American Southwest. This video looks at the impact of Spanish missions to North America and how many Native...

An introductory lecture to the basics of Andrew Jackson's Indian Removal Act.

An overview of the way we count.

This video discusses the various methods of waste management, including transportation, treatment, and disposal. It also touches upon the importance of proper waste management in maintaining a clean and safe environment. Additionally, it...

No period of history can boast of greater beauty than The Renaissance. This was the period, from approximately early 14th century to late 16th century, that gave us Leonardo da Vinci, Michelangelo, and Shakespeare. The humanist movement...

In this video, students learn how to read and write decimals using base 10 blocks. The video explains that decimals represent parts of a whole, and demonstrates how to read and interpret decimal numbers. It also introduces the concept of...

Birds are a vertebrate group with which we are all familiar. This beautiful and colorful series of videos explores the major characteristics, adaptations, and life cycles of this group of animals. Special emphasis is paid to the features...