Math Planet
Math Planet: The Substitution Method for Solving Linear Systems
A way to solve a linear system algebraically is to use the substitution method. The substitution method functions by substituting the one y-value with the other. This resource explains this method by showing an example along with a video.
A&E Television
History.com: How Interstate Highways Gutted Communities and Reinforced Segregation
America's interstate highway system cut through the heart of dozens of urban neighborhoods. Congress approved the Federal-Aid Highway Act of 1956, authorizing what was then the largest public works program in U.S. history. It promised to...
A&E Television
History.com: How the Black Death Spread Along the Silk Road
The Silk Road was a vital trading route connecting East and West -- but it also became a conduit for one of history's deadliest pandemics. The Silk Road, a network of land and sea trade routes that connected China and the Far East with...
Khan Academy
Khan Academy: Roots of Hinduism
Hinduism is one of the world's oldest religions. It has complex roots, and involves a vast array of practices and a host of deities. Its plethora of forms and beliefs reflects the tremendous diversity of India, where most of its one...
A&E Television
History.com: Alcatraz Escapes: 14 Breakout Attempts From the Island Prison
To ditch Alcatraz, the infamous federal penitentiary, inmates tried everything from papier-mache masks to a military impersonation to a bloody revolt. Over those three decades, the infamous prison known as "The Rock" housed more than...