31 Various 2007 <p>The LRDC states, &quot;Our mission is both to perform world-class research on teaching and learning and to apply what we learn, in collaboration with education practitioners, business and government enterprises, and non-profit organizations, to the reform and improvement of instruction and learning in schools, museums, universities and workplaces&quot; Part of the work includes developing instruments to rate instructional quality, classrom practice, and teacher assignments</p> <p>The Learning Research and Development Center (2007). Retrieved from the University of Pittsburgh 5 May 2008. http://www.lrdc.pitt.edu/</p> http://www.lrdc.pitt.edu/