Interactive web site where students can learn about the development of the geography of the United States over the course of history. This section of the site focuses on the original inhabitants of North America, in particular the...

Video program showing how to use a scatter plot to illustrate relationship between response and explanatory variables, to determine patterns in variables, and to calculate least squares. Real-life examples -- manatee deaths per number of...

Video presentation on the probability of independent events, covering related topics: multiplication rule, random variable, and mean and standard deviation. [28:41]

Explore the different types of rocks on our Earth as you watch a one-hour video, accompanied by learning goals, details on sedimentary rocks, fossils, and supercontinents, and more.

Take this online quiz and test your knowledge of geological history, and the formation of our atmosphere, water, crust, oxygen, tectonic plates, Moon, and the rest of the Earth.

At this website there is basic information about world population growth over the last 300+ years. The link at the end of the article is to another article that compares the population growth of two states.