Spit is critical for our health. Actually.

Bones, you probably have them and they're for more than holding your body upright.

Paul Andersen begins by explaining the structure and purpose of carbohydrates. He describes and gives examples of monosaccharides, disaccharides, oligosaccharide and polysaccharides. He explains how they grow through dehydration...

Alcohol has been an important part of human culture for a very long time, and from the basic process, we've figured out how to create a wide variety of alcohol beverages!

Ideas like liberty, freedom, and self-determination were hot stuff in the late 18th century, as evidenced by our recent revolutionary videos. Although freedom was breaking out all over, many of the societies that were touting these ideas...

In which John Green teaches you about one of the least funny subjects in history: slavery. John investigates when and where slavery originated, how it changed over the centuries, and how Europeans and colonists in the Americas arrived...

Mister Brown and Squeaks are making bread, and they're going to need a tiny little helper to get the job done: a fungus called yeast!



Disciplinary

Core Idea:

PS1.B: Chemical Reactions - Heating or cooling a...

On a cold day, sometimes people will say "I'm freezing!," even though they aren't actually frozen like ice. But there is a very special animal that can say "I'm freezing" and mean it: wood frogs! Join Jessi and Squeaks to...

In this video Paul Andersen describes the structure and explains the properties of molecular solids. High intramolecular forces hold electrons and reduce conductivity, whereas low intermolecular forces decrease the melting point. ...

If gigantic googly eyes make you want to run away, it’s because you are responding to a supernormal stimulus. But what is it, and why our brain responds to it?

We've talked about mixtures and solutions, solutes and solvents, but what about things that can't be undone? What about Chemical Changes? Would it surprise you to know that baking a cake is a Chemical Change? Or striking a match? In this...

Paul Andersen begins with a brief description of NASA discoveries related to Mars, Mercury and water. He then explains why water is required for life. He finally uses a simulation to show you why water acts as a wonderful solvent and...

In which John Green teaches you about Imperialism. In the late 19th century, the great powers of Europe were running around the world obtaining colonial possessions, especially in Africa and Asia. The United States, which as a young...

We've compiled our videos about sugar and sweetness here. Enjoy the rush!

In which John Green teaches you about the beginnings of the American Revolution in a video titled The Seven Years War. Confusing? Maybe. John argues that the Seven Years War, which is often called the French and Indian War in the US,...

Join Jessi and Squeaks as they prepare a special meal for friends. You’ll learn some fun food science facts, like the difference between fruits and veggies and how your tongue works so you can taste food!

In which John Green teaches you about one of the least funny subjects in history: slavery. John investigates when and where slavery originated, how it changed over the centuries, and how Europeans and colonists in the Americas arrived at...

Mr. Andersen walks you through the cellular respiration lab.

Sustaining life requires substantial energy and matter inputs. The complex struc- tural organization of organisms accommodates the capture, transformation, trans- port, release, and elimination of the matter and energy needed to sustain...

Find out why these arachnids are among the least B of humanity's BFFs. Yeah, they're blood-sucking parasites, but that's not all of it!

Where does bread get its fluffiness? Swiss cheese its holes? And what makes vinegar so sour? These foods may taste completely different, but all of these phenomena come from microorganisms chowing down on sugar and belching up some...

Plants have their own interconnected networks that allow them to communicate with each other, sometimes over considerable distances!

If you've heard it once, you've heard it a thousand times: Parents blaming their kids' active behavior on sugar. But is it true? Hank gives you sweet-and-lowdown on the extent to which sugar can and can't affect behavior, in kids and...

Learn about our 5 main food groups with Jessi and Squeaks, then see if you can name them all!