English Levels
(Based on the
CEFR)
A2: Basic - Elementary (coming soon)
B1: Intermediate
B2: Upper Intermediate
C1: Advanced
Difficulty: 2.59
Angela Patton: A father-daughter dance ... in prison
Difficulty: 2.82
Geoffrey Canada: Our failing schools. Enough is enough!
Difficulty: 2.98
Joachim de Posada: Don't eat the marshmallow!
Difficulty: 3.08
David Hoffman: What happens when you lose everything
Difficulty: 3.28
Hans Rosling: Global population growth, box by box
Difficulty: 3.31
Bono: The good news on poverty (Yes, there's good news)
Difficulty: 3.32
Dan Dennett: Let's teach religion -- all religion -- in schools
Difficulty: 3.33
Harish Manwani: Profit’s not always the point
Difficulty: 3.34
Marc Pachter: The art of the interview
Difficulty: 3.39
Margaret Heffernan: The dangers of "willful blindness"
Difficulty: 3.39
Ilona Szabó de Carvalho: 4 lessons I learned from taking a stand against drugs and gun violence
Difficulty: 3.44
Monica Lewinsky: The price of shame
Difficulty: 3.54
Jessa Gamble: Our natural sleep cycle is nothing like what we do now
Difficulty: 3.54
Nancy Lublin: Texting that saves lives
Difficulty: 3.55
Jane Goodall: How humans and animals can live together
Difficulty: 3.56
Ali Carr-Chellman: Gaming to re-engage boys in learning
Difficulty: 3.62
Sally Kohn: Don't like clickbait? Don't click
Difficulty: 3.63
Mellody Hobson: Color blind or color brave?
Difficulty: 3.69
Tasso Azevedo: Hopeful lessons from the battle to save rainforests
Difficulty: 3.73
Sendhil Mullainathan: Solving social problems with a nudge
Difficulty: 3.73
Woody Norris: Hypersonic sound and other inventions
Difficulty: 3.75
Dave Eggers: My wish: Once Upon a School
Difficulty: 3.79
C.K. Williams: Poetry of youth and age
Difficulty: 3.83
Paul Romer: Why the world needs charter cities
Difficulty: 3.87
Misha Glenny: Hire the hackers!
Difficulty: 3.91
Stefan Wolff: The path to ending ethnic conflicts
Difficulty: 3.95
Martine Rothblatt: My daughter, my wife, our robot, and the quest for immortality
Difficulty: 4.00
Rajesh Rao: A Rosetta Stone for a lost language
Difficulty: 4.04
David Bolinsky: Visualizing the wonder of a living cell
Difficulty: 4.07
Gary Greenberg: The beautiful nano details of our world
Difficulty: 4.09
David Keith: A critical look at geoengineering against climate change
Difficulty: 4.12
David Brooks: The social animal
Difficulty: 4.13
Lorrie Faith Cranor: What’s wrong with your pa$$w0rd?
Difficulty: 4.13
Holly Morris: Why stay in Chernobyl? Because it's home.
Difficulty: 4.18
Vinay Venkatraman: Technology crafts for the digitally underserved
Difficulty: 4.18
George Monbiot: For more wonder, rewild the world
Difficulty: 4.22
Majora Carter: Greening the ghetto
Difficulty: 4.25
Susan Solomon: The promise of research with stem cells
Difficulty: 4.40
Sean Carroll: Distant time and the hint of a multiverse
Difficulty: 4.42
Rory Sutherland: Life lessons from an ad man
Difficulty: 4.49
Samantha Power: A complicated hero in the war on dictatorship
Difficulty: 4.70
Robert Gupta: Music is medicine, music is sanity
Difficulty: 4.71
Damian Palin: Mining minerals from seawater
Difficulty: 4.85
Dean Ornish: The killer American diet that's sweeping the planet
Difficulty: 4.94
Carin Bondar: The birds and the bees are just the beginning
