TED-Ed

View full lesson: http://ed.ted.com/lessons/got-seeds-just-add-bleach-acid-and-sandpaper-mary-koga

Uploaded 16-07-13

For a seed to start growing, its embryo must emerge from its hard coat. In nature the embryo is aided by frost and animal digestion -- but humans can help too. Nicking, filing, and soaking the seed in hot water or acid are all forms of scarification, or ways to speed up germination by breaking down the shell. Mary Koga offers some tips to spur your sprouts (and don't forget the bleach!).

Lesson by Mary Koga, animation by Provincia Studio.



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This is one of five student perspectives featured in the PBS special "TED Talks Education" (#TEDTalksed.) Learn more here: https://www.ted.com/promos/TEDTalksEducation

Special thanks to our partners in this endeavor: WNET, PBS and the Corporation for Public Broadcasting.

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Uploaded 26-07-18

View full lesson: https://ed.ted.com/lessons/how-can-you-change-someone-s-mind-spoiler-facts-don-t-work-so-well-hugo-mercier

Why do arguments change people’s minds in some cases and backfire in others? Hugo Mercier explains how arguments are more convincing when they rest on a good knowledge of the audience, taking into account what the audience believes, who they trust, and what they value.

Lesson by Hugo Mercier, animation by TED-Ed.

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Take a look inside the leafcutter ant colony as a queen begins her reign and the ants work to sustain their supply of fungus.

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In a Texas clearing, an ancient tale that ties four species together is unfurling. The first involved is a soon-to-be queen leafcutter ant. The second is fungus, a piece of which she scoops into her mouth pocket. The third are cockroaches, which nestle under her wings. And the fourth is the one that threatens them all. Charles Wallace takes a look inside the ant colony as a queen begins her reign.

Lesson by Charles Wallace, directed by Charlotte Arene.

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View full lesson: https://ed.ted.com/lessons/when-you-re-an-ant-but-also-a-fungus-tycoon-charles-wallace
Dig deeper with additional resources: https://ed.ted.com/lessons/when-you-re-an-ant-but-also-a-fungus-tycoon-charles-wallace#digdeeper

Animator's website: https://vimeo.com/charlottearene
Music: https://soundcloud.com/aim-music
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Get to know the history of Juneteenth, a commemoration of the end of slavery in the United States after the Civil War.

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At the end of the Civil War, though slavery was technically illegal in all states, it still persisted in the last bastions of the Confederacy. This was the case when Union General Gordon Granger marched his troops into Galveston, Texas on June 19th and announced that all enslaved people there were officially free. Karlos K. Hill and Soraya Field Fiorio dig into the history of Juneteenth.

Lesson by Karlos K. Hill and Soraya Field Fiorio, directed by Rémi Cans, Atypicalist.

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View full lesson: https://ed.ted.com/lessons/when-did-slavery-actually-end-in-the-united-states-karlos-k-hill-and-soraya-field-fiorio
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In this funny and insightful talk, builder Dan Phillips tours us through a dozen homes he's built in Texas using recycled and reclaimed materials in wildly creative ways. Brilliant, low-tech design details will refresh your own creative drive. (Filmed at TEDxHouston.)

Uploaded 17-07-13

Talk by Dan Phillips.



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View full lesson: http://ed.ted.com/lessons/the-networked-beauty-of-forests-suzanne-simard

Uploaded 14-04-14

Deforestation causes more greenhouse gas emissions than all trains, planes and automobiles combined. What can we do to change this contributor to global warming? Suzanne Simard examines how the complex, symbiotic networks of our forests mimic our own neural and social networks -- and how those connections might make all the difference.

Talk by Suzanne Simard.



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View full lesson: http://ed.ted.com/lessons/why-the-arctic-is-climate-change-s-canary-in-the-coal-mine-william-chapman

Uploaded 22-01-15

The Arctic may seem like a frozen and desolate environment where nothing ever changes. But the climate of this unique and remote region can be both an early indicator of the climate of the rest of the Earth and a driver for weather patterns across the globe. William Chapman explains why scientists often describe the Arctic as the “canary in the coal mine” when it comes to climate change.

Lesson by William Chapman, animation by Sandro Katamashvili.



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Explore how the domestication of horses influenced the fate of entire civilizations and dramatically altered human history.

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People have been captivated by horses for a long time. They appear more than any other animal in cave paintings dating back 30,000 years. But how did horses make the journey from wild animals to ones humans could hitch themselves to and even ride? William T. Taylor explores how the domestication of horses influenced the fate of entire civilizations and dramatically altered human history.

Lesson by William T. Taylor, directed by Denys Spolitak.

William T. Taylor's research for this project was supported by an award from the National Science Foundation (NSF Award number 1949305, "Horses and Human Societies in the American West").

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View full lesson: https://ed.ted.com/lessons/how-horses-changed-history-william-t-taylor
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Music: https://www.campstudio.co
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Explore why Maya Angelou’s memoir “I Know Why The Caged Bird Sings” became one of the most frequently banned books of all time.

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In 1998, a school district removed one of American literature’s most acclaimed works from its curriculum. Parents pushing for the ban said the book was both “sexually explicit” and “anti-white.” The book at the center of this debate was Maya Angelou’s “I Know Why The Caged Bird Sings.” Why was the memoir so controversial? Mollie Godfrey digs into one of the most banned books of all time.

Lesson by Mollie Godfrey, directed by Laura White.

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View full lesson: https://ed.ted.com/lessons/one-of-the-most-banned-books-of-all-time-mollie-godfrey
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