New York schools chancellor Joel Klein often speaks eloquently about the harm that the education system’s inability to dismiss incompetent teachers does to children. He’s right about that, of course.

Bob Moses became famous as one of the chief organizers of the Freedom Summer of 1964, when hundreds of college students invaded Mississippi to fight nonviolently for civil rights. But Moses was also a ...

An equation is a mathematical statement showing that two expressions are equal. The two expressions are linked with an equals symbol (=). The unknown variable (often the letter \(x\)) can take any ...

This jingle has helped generations of algebra students recall the quadratic formula that solves every equation of the form $latex ax^2+bx+c=0$. The formula is as ...

Bob Moses became famous as one of the chief organizers of the Freedom Summer of 1964, when hundreds of college students invaded Mississippi to fight nonviolently for civil rights. But Moses was also a ...