How many beginning teachers struggle to create new lessons despite the fact that experienced teachers have already designed effective lessons for the same content? Shulman (1987) used the term "collective amnesia" to describe the failure of school leaders to design professional development that included the collection of its best…

Presents results from elementary school classroom uses of the Computer Supported Integrated Learning Environments (CSILE) software that stores student productions, including text and graphics, in one database to which all users have simultaneous access. Educational uses, effects, and outcomes of CSILE are described; and knowledge construction is…