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When a radical is not a perfect square (1, 4, 9, 16, …), estimating square roots is a valuable tool. When asked to estimate the value of a radical between two consecutive integers, find the two ...

Radical equations are equations that have square root terms. When solving radical equations, try to isolate the radical expression on one side of the equation and then square both sides (it is the inv ...

This program examines Mayan jaguar worship, Mayan gods who required human and animal sacrifice, and Mayan mathematicians who understood the concept of "zero" hundreds of years before Arab ma ...

English Teaching 101 is a blog for ESL (English as a second language) for teachers and parents. You may find esl games and ideas, EdTech recommendation and various teaching styles and philosophy.

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Videos about numbers - it's that simple. Numberphile is produced by video journalist Brady Haran. The stars of the show include mathematicians and other guests from around the world. Topics range ...

SciShow Kids explores all those curious topics that make us ask "why?" Whether conducting experiments, researching new questions, or talking with experts, there's always something new to ...

This blog is an attempt to bring a little of England closer to foreign students and teachers of English with anecdotes, quotes from famous English-speaking people, stories, plays, games, videos and ex ...

Who was Florence Nightingale? Watch this story, one of our 'British tales' videos about characters and people from British history, to find out!

Every great story has a strong foundation—the story structure. Structure helps storytellers answer the critical question: what do I want my audience to know and when?

In the newest Khan Academy ...

At the end of the Mythic Period of China's history, the Xia dynasty gave way to the Shang Dynasty… if the Xia really existed at all! Sal gives an overview of the Xia, Shang, and Zhou Dynast ...