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Débora Aladim believes that everyone knows something interesting or useful. She was able to put this belief to the test when, while still in school, she started posting video lessons on History and Portuguese to help her classmates study. Today, she is one of the biggest YouTubers in this field in Brazil. Débora is from Minas Gerais, and is a History student at UFMG. She started helping her classmates with their exams and became the biggest YouTuber on education in Brazil, having made video lessons for the Ministry of Education in 2016. She makes video lessons that have already helped millions of people study and pass their college entrance exams. 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