A Report prepared for the Center for Strengthening the Teaching Profession (CSTP) by Margaret L. Plecki, Ana M. Elfers, and Michael S. Knapp, January 2007.Plecki, Margaret, Elfers, Ana, Knapp, MichaelPDF: https://www.education.uw.edu/ctp/sites/default/files/ctpmail/PDFs/WhosTeaching20…Publication Date: January 2007