Talks about basics of blockchain and its application. Dr. John Bryk is in his first year teaching mathematics and computer science at Miss Porter's. He earned his bachelor's degree at Williams College and his doctorate in mathematics at Rutgers University. After holding a professorship at John Jay College in New York for the better part of a decade, he decided to switch to teaching high school three years ago and hasn't looked back since. Ever eager to expand his horizons, he devoted himself to learning about blockchain this fall and will be teaching a course on the technology next year. 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