This video lesson is on the details of cancer cell growth. How do cancer cells grow? How does chemotherapy fight cancer (and cause negative side effects)? The answers lie in cell division. George Zaidan explains how rapid cell division is cancer壽猻 "strength" -- and also its weakness.

Infertility affects 1 in 8 couples worldwide. But in the last 40 years, more than 5 million babies have been born using in vitro fertilization (IVF). How does it work? Nassim Assefi and Brian A. Levine detail the science behind making a baby in a lab.

In a world where growing older can mean entering into a complex and confusing maze of difficult choices, Amy O'Rourke stands out as a passionate advocate for the elderly and their families. As founder of Cameron Group Care Management Services, she prioritizes quality of life and helps families and elders navigate the challenges of aging while supporting vital lifestyle preferences.

The ratio of a circle's circumference to its diameter is always the same: 3.14159... and on and on (literally!) forever. This irrational number, pi, has an infinite number of digits, so we'll never figure out its exact value no matter how close we seem to get. Reynaldo Lopes explains pi's vast applications to the study of music, financial models, and even the density of the universe.

You're in a movie theater, watching the new horror flick. The audience knows something that the main character does not. The audience sees the character's actions are not in his best interest. What's that feeling -- the one that makes you want to shout at the screen? Christopher Warner identifies this storytelling device as dramatic irony.

佮You亹re a fishmonger!桃 By taking a closer look at Shakespeare亹s words--specifically his insults--we see why he is known as a master playwright whose works transcend time and appeal to audiences all over the world. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 6-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.

When we hear the word radiation, it壽猻 tempting to picture huge explosions and frightening mutations. But that壽猻 not the full story 壽� radiation also applies to rainbows and a doctor examining an X-ray. So what is it, really, and how much should we worry about its effects? Matt Anticole describes the different types of radiation.Lect

Nobel laureate James Watson opens TED2005 with the frank and funny story of how he and his research partner, Francis Crick, discovered the structure of DNA. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 20-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.

Janet Echelman found her true voice as an artist when her paints went missing -- which forced her to look to an unorthodox new art material. Now she makes billowing, flowing, building-sized sculpture with a surprisingly geeky edge. A transporting 10 minutes of pure creativity. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 10-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.

Psychologist Jonathan Haidt studies the five moral values that form the basis of our political choices, whether we're left, right or center. In this eye-opening talk, he pinpoints the moral values that liberals and conservatives tend to honor most. Jonathan Haidt studies how -- and why -- we evolved to be moral. By understanding more about our moral roots, his hope is that we can learn to be civil and open-minded. His new book is "The Righteous Mind: Why Good People are Divided by Politics and Religion." A quiz, thought provoking question, and links for further study are provided to create a lesson around the 19-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.

Just how small are atoms? And what's inside them? The answers turn out to be astounding, even for those who think they know. This fast-paced animation uses spectacular metaphors (imagine a blueberry the size of a football stadium!) to give a visceral sense of the building blocks that make our world. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 5-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.

A lesson for every single element on the period table. Created by the Periodic Videos team using the TED-Ed platform.

Each lesson has a video and it guide you through learning about it. Resources include:

WATCH

THINK (Questions)

DISCUSS (Discussion Questions)

AND FINALLY (Which is different and depends on the element)

You can also customize the lesson and share what you've made.

Tipping Point author Malcolm Gladwell gets inside the food industry's pursuit of the perfect spaghetti sauce -- and makes a larger argument about the nature of choice and happiness. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 17-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.

TED Studies, created in collaboration with Wiley, are curated video collections 逖 supplemented by rich educational materials 逖 for students, educators and self-guided learners. In Leading Wisely, speakers share powerful insights about leaders across a wide range of fields and domains who inspire great results from their teams. Great management in a turbulent global economy has never been so important. Relevant areas of interest, study and coursework include:迨

TED Studies, created in collaboration with Wiley, are curated video collections 逖 supplemented by rich educational materials 逖 for students, educators and self-guided learners. In The Deep Ocean, aquatic explorers take the TED stage to share what they've seen in the abyss of Earth's last frontier: the deep ocean, home to massive underwater mountains and valleys, giant smoking chimneys and an amazing array of animals.

Martin Seligman talks about psychology -- as a field of study and as it works one-on-one with each patient and each practitioner. As it moves beyond a focus on disease, what can modern psychology help us to become? A quiz, thought provoking question, and links for further study are provided to create a lesson around the 24-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.

TED Studies, created in collaboration with Wiley, are curated video collections 逍 supplemented by rich educational materials 逍 for students, educators and self-guided learners. In Covering World News, media executives, journalists and authors explore how our ability to understand and participate in a global society is helped or hindered by Western media coverage of world events. As technology and a tough economy change the way mainstream media companies do business, will international news be an albatross or an asset?

TED Studies, created in collaboration with Wiley, are curated video collections 逖 supplemented by rich educational materials 逖 for students, educators and self-guided learners. The speakers in Rethinking Cancer give the talk of their lives about the prevention, detection and treatment of one of the leading causes of death worldwide: cancer. In this course, you逭ll question fundamental concepts about what cancer is and rethink how cancer research should be conducted.

Why do teenagers seem so much more impulsive, so much less self-aware than grown-ups? Cognitive neuroscientist Sarah-Jayne Blakemore compares the prefrontal cortex in adolescents to that of adults, to show us how typically "teenage" behavior is caused by the growing and developing brain.

Cognitive researcher Nancy Etcoff looks at happiness -- the ways we try to achieve and increase it, the way it's untethered to our real circumstances, and its surprising effect on our bodies. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 14-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.