Recruiting, preparing, and retaining high quality secondary mathematics and science teachers are three of the most critical problems in the nation's urban schools that serve a vast majority of children from socially and economically disadvantaged backgrounds. Although the factors contributing to these problems are complex, one area that has caught…

Traditional measures of teachers' competency have been widely criticized for their lack of authenticity and predictive validity. There is little evidence regarding the technical soundness of traditional teacher licensure tests and little research documenting the validity of such tests for identifying competent teachers or effective teaching.…