When resting, blood goes from the heart to the lungs and back in about six seconds. An animation of the heart starts simply by showing blood flow through the two halves. It builds in complexity slowly over the course of five slides,...

Need an online resource to supplement the paper textbook in your classroom? An all-encompassing website covers historical events throughout the last half of the second millenium, leading right up to the third. From the pre-Columbian...

Imagine studying Korean culture, especially the role of women, as well as marriage and religious rituals from home! Anthropologist Laurel Kendall shares what she has learned from her many trips to this fascinating country half a world away.

Not all sources are created equal, so how do you evaluate them? Writers learn how to evaluate print sources based on elements such as audience, tone, and argument in the sixth handout of 24 in the Writing the Paper series from the...

Start seeing double. The American Museum of Natural History website provides pupils with information about Dolly, the cloned sheep. Learners find out the procedure used to create Dolly along with why scientists clone animals.

Why do many Native Americans live on reservations? An interactive resource teaches about how reservations came to be and the tragic history behind Native Americans moving from their lands. Teenagers read passages, view images, and click...

America has dealt with its fair share of hardships in contemporary history. The resource discusses the events of the Gulf War, September 11th, the Afghanistan War, and The Iraq War. Scholars click on artifacts to learn more information,...

Many know that Native Americans were forced off their lands and moved west, but how did these people react? The Red Sticks faction of the Creek nation opted to defend themselves and their lands in a series of wars called the Eastern...

Convenience, taste, portability ... what's not to love about bottled water? Apparently, a lot. Scholars analyze the four main arguments supporting and opposing the sale of bottled water. They explore the health, environmental, and...

Bayer Pharmaceuticals sold heroin as a cough medicine in the 1900s ... who knew? Scholars discover this, and other interesting facts, when they use the resource to prepare for a class discussion or debate. They browse videos, readers'...

Is screen time dangerous time? Scholars take a close look at the facts surrounding video games and violence. Pros give evidence connecting violence to video games while cons suggest there is no relationship.

Without the greenhouse effect, Earth would not be inhabitable. A thorough online resource describes the greenhouse effect and how it occurs. The source highlights the different types of gases that work together to absorb the sun's...

Almost 600,000 Americans are arrested each year for marijuana possession. Pupils decide if marijuana should be legalized for recreational use after reading state-by-state laws and the top pro and con arguments. The resource also includes...

A website looks at how we know so much about Mars—telescopes, robots, and spacecraft—and the search for martian life. Following the informational text are three questions that quiz pupils about possible life on Mars. 

This is a concise description of the turmoil in the Republican Party leading up to the campaign and election of 1880. How or whether to reform the patronage system was at the heart of the selection of a candidate. Find out about the...

In this Cyberchase video segment, Wicked and Digit solve a fraction puzzle in order to move on in their quest to save the CyberSquad.

A wealth of resources to help you in planning classroom instruction on rational expressions: lesson plans offer guidelines for and examples of simplifying, adding and subtracting, multiplying and dividing rational expressions; practice...

A program to put an end to the oppression of women and girls worldwide brings together an information site where visitors can find blogs, social media feeds, celebrity and crew diaries, videos, and up-to-date information about the...

Elmhurst College offers excellent but advanced information on the distillation of crude oil, including a crude oil distillation tower.

In this video segment from Cyberchase, the CyberSquad must locate a crystal with the highest fraction of orange color.

Wicked and Digit must solve a fraction problem in order to free the CyberSquad in this video from Cyberchase.

Find a quick, concise explanation of all aspects of fractions including operations involving two fractions, and working with mixed numbers. Examples are given and clearly explained.

This site includes outline notes that describe the Tudor Revival period in architecture. Also provides some notes over half-timbering (a characteristic of the Tudor Revival), and provides a wealth of example photographs of homes that...

Check out this colorful animation to learn about the sport of snowboarding in the Winter Olympics. Learn about the various snowboarding events (parallel giant slalom, snowboard cross, and half-pipe) and the courses, competition, scoring,...