Michael Wesch has been on the lecture circuit for years touting new models of active teaching with technology. The associate professor of cultural anthropology at Kansas State University has given TED talks. Wired magazine gave him a Rave Award. The Carnegie Foundation for the Advancement of Teaching once named him a national professor of the year. But now Mr. Wesch finds himself rethinking the fundamentals of teaching after hearing that other professors can't get his experiments with Twitter and YouTube to work in their classes. Is the lecture best after all?