The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about potassium. In this video, see some violent explosions and the gentle creation of a potassium mirror. [4:32]

Just now, somewhere in the universe, a star exploded. In fact, a supernova occurs every second or so in the observable universe. Yet, we've never actually been able to watch a supernova in its first violent moments. Is early detection...

Describes the different, often violent, ways American colonists reacted to the Stamp Act.

A short but highly informative article which looks at the many mis-perceptions in American society regarding Islam and its followers. Some of the topics explored include the idea whether or not Islam is a "violent" religion and the role...

Fred Kaplan's article in the October 2001 issue of The Atlantic Monthly, "JFK's First Strike Plan," shows that key White House officials and the President himself briefly considered proposals for a limited nuclear first strike against...

A good explanation of the Ludlow Massacre in the coalfields of Colorado and what led up to it. In addition, there is an interesting description of how this violent reaction to a strike by miners affected John D. Rockefeller, Jr., one of...

An interesting account of the Homestead Strike of 1892. Learn about the demands of the steelworkers and the violent response of the factory owners. Find drawings and pictures of what happened.

A series of topics relating to Sierra Leone's Civil War, peacekeeping actions, and the slow road to the country's recovery from years of strife and violent coups. A timeline of the key moments of Sierra Leone's history is helpful in...

Revolutions calling for political reform spread throughout North Africa and the Middle East in 2011. Here is a report on early protests in Syria, Bahrain and Yemen. Many protests turned violent in the wake of suppression. (March 2011)

This resource endeavours to construct pictures of ancient cultures based on clues from their tools and weapons. The picture left behind of the Aztecs is that of a violent society that routinely massacred people for religious and...

[Free Registration/Login Required] An informational text debating whether teens should or should not be allowed to play violent video games. A question sheet is available to help students build skills in reading comprehension.

[Free Registration/Login Required] Students read about Rosa Parks and her non-violent protest of segregation laws in the South. A question sheet is available to help students build skills in reading comprehension.

A highly interesting account of the rebellion that occurred in 1857 when Indian troops staged a violent outbreak against their British masters. The author examines the causes, events and results of the mutiny. Archived.

Learn how to handle situations and problems the right way without getting out of control, overly mad, or even violent. This sight teaches you the "Bam" plan, or tips "to keep your anger from boiling over".

Discusses the Indian reservation system, the impact it had on Native Americans, violent clashes between whites and Indians, and how it was destroyed by the Dawes Act of 1887 and resurrected in the 1930s. Includes questions for students...

The Myanmar (also known as Berma) military has been accused of human rights violations with their increasingly violent persecution of Rohingya Muslims, an ethnic and religious minority in the nation. The violence in Myanmar has displaced...

Read a brief description of the sit-in at the Woolworth lunch counter in Greensboro, North Carolina. This sit-in, passive and non-violent resistance to segregation laws, lasted for six months.

Research and discussion about the impact of brain injury and head trauma stemming from the increased identification of violent behavior, suicide and substance abuse of football players. The statistical research provided in a slideshow...

A background look at the violent war crimes and legal violations committed in Sierra Leone which led to the creation of the United Nations War Crimes Court in January 2002. The Special Court started to deliver verdicts for the crimes in...

The Last Judgement was a common theme in church art, but Michelangelo's interpretation was entirely novel. His vision of the Apocalypse is a swirling maelstrom, filled with thick-set and muscular naked figures. Traditional symmetry and...

The Kansas-Nebraska Act incited a violent struggle between pro- and anti-slavery advocates in Kansas, on the Senate floor, and eventually throughout the country.

From the radicalism of the Romantic poets to the violent suppression of protests, the 18th and 19th centuries were peppered with incidents of political upheaval. Read how power and politics feature centrally in some of the period's great...

Kabuki was one of the three most popular dramatic forms of Japan, the other two being Noh drama and puppet theater (bunraku). Singers and an orchestra of drums, flutes, wooden clappers, and samisen (a stringed instrument similar to the...

Reporting advice for adults and young people. Most services have rules about what kind of content is allowed on the site. Often if something is harassing an individual, pornographic or violent it breaks the rules. You can report this...