Protecting America's Competitive Edge Act (S. 2198) : finding, training, and keeping talented math and science teachers : hearing before the Subcommittee on Education and Early Childhood Development of the Committee on Health, Education, Labor, and Pensions, United States Senate, One Hundred Ninth Congress, second session, on examining S. 2198, to ensure the United States successfully competes in the 21st century global economy, focusing on finding, training, and keeping talented math and science teachers, February 28, 2006.