What a high school algebra teacher can teach us about innovation

Chances are that you've seen the handiwork of Karl Fisch. Along with Scott McLeod, he created the legendary Shift Happens videos, which have now been viewed online roughly four gazillion times.

But Fisch also has a day job — at Arapahoe High School, near Denver. This year, in addition to his other duties, he's begun teaching algebra to 9th and 10th graders. And he's taken a novel approach: Instead of lecturing during class time and assigning problems as homework, he's flipped the sequence. He ...