It's a few minutes after 7 a.m. on a drizzly Friday morning and math teacher Jonathan Winn is standing just outside his first period classroom yelling at the top of his lungs, his voice reverberating across campus. "How does that go?!" He's not so much yelling at his students as yelling for them, exhorting them to shout out the answer to a complex calculus problem, in unison. A few minutes later, Winn is dressed in a wig and a white ruffled shirt, playing 18th-century mathematician Gottfried Leibniz doing calculus in Paris. Later in the 90-minute class, he puts on a drum major's hat and exchanges drum beats and claps with his students, to get them to feel the power of their unity.