An introduction to the mole, a unit of measurement that quantifies atoms and molecules.

In this first lesson of a three-part series on space-time, hilarious hosts Andrew Pontzen and Tom Whyntie go through the basics of space and time individually, and use a flip book to illustrate how we can begin to look at them together....

Learn about different leadership styles and decide which one works best for your situation and personality. Because there is no "right" way to lead in every situation, the different styles and theories of leadership presented here can...

This site from The Victorian Web allows one to read about relationships between Victorian men and women. This article focuses on the sexual tensions and stereotypes prevalent during the Victorian Era, and defines the "roles" of men and...

Describes how to use dot products to project one vector onto another.

Learn about different leadership styles and decide which one works best for your situation and personality. Because there is no "right" way to lead in every situation, the different styles and theories of leadership presented here can...

This illustrated timeline from the NOVA Web site turns back the clock to the late 1500's to relive the dramatic life of one of the world's most renowned scientists.

Excellent, clearly written introduction to "virtue theories" of morality. Reviews the archetypical theories of Aristotle and Aquinas before turning to contemporary versions. Presents one possible philosophical critique of virtue theory...

Explains the history of the lost Roanoke Colony and the various theories about what may have happened to the colonists. Virginia Dare was the first English child born in the New World, yet no one knows what eventually happened to her.

A series of lectures on the Industrial Revolution, written by one of the most famous economic historians of the nineteenth century.

Alex, Mel, and Chelsea play a game that has 6 rounds. In each round there is a single winner, and the outcomes of the rounds are independent. For each round the probability that Alex wins is $\frac{1}{2}$, and Mel is twice as likely to...

This April 2004 article provides insight and one view into the world of asteroid heating, the age of meteorites and new theories in the changes in shocked and unshocked chondrites. Some great photomicrographs.

Biography of Galileo Galilei (1564-1642), one of the most famous scientists and inventors of all time. He is best remembered for his invention of the telescope, which caused him to question the contemporary belief that the Earth was the...

How do we know what matter is made of? The quest for the atom has been a long one, beginning 2,400 years ago with the work of a Greek philosopher and later continued by a Quaker and a few Nobel Prize-winning scientists. Theresa Doud...

Learn about the life and work of one of the pioneers of quantum physics, Wolfgang Ernst Pauli.

At this site from the Massachusetts Institute of Technology, you can read about the inventor of "Heavy Water," Gilbert Newton Lewis, who is "one of the most influential and admired scientists of the twentieth century."

One knife pulled from the sea may shed more light on the mysteries of the first Americans. Archaeologists are still shaping the new Coastal Migration Route theory one artifact at a time.

This article discusses the mystery of the one to two billion metric tons of missing carbon from the global carbon budget. Scientists do not know where between fifteen and thirty percent of the carbon released each year disappears to, but...

What happens when an electron is trapped in a one-dimensional box? Take a look at these theories and equations applied to examples which can be illustrated this way.

Critical thinking, comprehension and analysis skills are the focus of this physical activity. Good beginning to teaching different ways of looking at things.