March 1, 2017

Scanning the nearly 150 students she could see from the front of her lecture halls, Rutgers University professor Sara Campbell waited for a hand.

Campbell was in a test prep session in her exercise physiology course, and when the answers started coming in she quickly called on one of the students in her classroom.

After writing that response on the chalkboard, Campbell turned her attention to a large video screen on the lecture hall's back wall and called on a student watching from a classroom on the other side of campus, nearly five miles away.

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