This article describes how a top physicist took charge of reforming undergraduate science education at the University of British Columbia. Carl E. Wieman, the 2001 Nobel Prize winner in Physics, gave up his research career to devote himself to improving the way college science is taught. Wieman is heading up a $10.2 million science education initiative at the University of British Columbia. He will devote 20 percent of his time to a similar but smaller effort backed by his former employer, the University of Colorado at Boulder. Wieman says that his goal is to move science education at the two institutions away from traditional lectures and toward "active and cooperative learning" involving smaller class sizes, group work, and interactive computer simulations.