From today’s New York Times:

In his country [Finland], Dr. Sahlberg said later in an interview, teachers typically spend about four hours a day in the classroom, and are paid to spend two hours a week on professional development. At the University of Helsinki, where he teaches, 2,400 people competed last year for 120 slots in the (fully subsidized) master’s program for schoolteachers. “It’s more difficult getting into teacher education than law or medicine,” he said.