Luvvie Ajayi isn't afraid to speak her mind or to be the one dissenting voice in a crowd, and neither should you. "Your silence serves no one," says the writer, activist and self-proclaimed professional troublemaker. In this bright, uplifting talk, Ajayi shares three questions to ask yourself if you're teetering on the edge of speaking up or quieting down -- and encourages all of us to get a little more comfortable with being uncomfortable.

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Scott Geller is Alumni Distinguished Professor at Virginia Tech and Director of the Center for Applied Behavior Systems in the Department of Psychology. He is a Fellow of the American Psychological Association, the Association for Psychological Science, and the World Academy of Productivity and Quality. He has written numerous articles and books, including When No One's Watching: Living and Leading Self-motivation. Scott will examine how we can become self-motivated in "The Psychology of Self-Motivation."

Have you ever felt like you're talking, but nobody is listening? Here's Julian Treasure to help you fix that. As the sound expert demonstrates some useful vocal exercises and shares tips on how to speak with empathy, he offers his vision for a sonorous world of listening and understanding.

Marco is currently a full-time research scholar at Harvard University. The aim of the research is to help us to better understand learning and memory. Marco talks about the building and implementation of habits and their benefit to "get a bit better every day". Marco is an upcoming cognitive neuroscientist from the University of Amsterdam (UvA), health consultant and enthusiastic Crossfitter. The impulse to better understand the human psyche and brain came first through his parents, who are both psychologists, and was later sparked by inspiring authors and researchers, such as Sam Harris.

Currently, Marco is a full-time research scholar at Harvard University, working on the Connectome Project in the research team of Prof. Lichtman. The aim of the research is to better understand the patterns of neural connections in the brain of living animals, which ultimately helps us to better understand learning and memory.

Marco’s morning routine, which consists of Zen meditation, stretching, breath work and a cold shower, gives him the energy to tackle every day afresh. Moreover, he is all around passionate about living a holistically healthy and balanced life by working out daily, following a mainly plant-based diet and taking care of his sleep. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

The world is not a fair place and not everyone gets to live out their dreams, but should this stop us from dreaming? Early on teenagers have their dreams beaten out of them by life. This talk attempts to revive this lost dream in teenagers across the world

As a student with a very diverse ethnic background, Laurence is a true embodiment of the international nature of Dhahran High School - where he is now a junior. He is a leader in his school's Model United Nations Club as well as a member of his school's student council.

This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx

Check out how Alexis Bennett worked her way from college to working at one of fashion's premiere publications.