While there is considerable scholarship describing principles for effective professional development, there have been few attempts to examine these principles in practice. In this paper, we identify and examine the particular design features of a mathematics professional development experience provided for middle grades teachers over 14 weeks. The…

The primary objective of the Project to Increase Mastery of Mathematics and Science (PIMMS) is to bring high quality staff development in mathematics and science to teachers of all levels. This report describes the progress PIMMS has made over the past 12 years in fostering an appreciation of mathematics and science by teachers in the state of…

Widespread agreement exists that U.S. teachers need improved mathematics knowledge for teaching. Over the past decade, policymakers have funded a range of professional development efforts designed to address this need. However, there has been little success in determining whether and when teachers develop mathematical knowledge from professional…