ABSTRACT
Science teachers are an essential link between the scientifically oriented citizens of the present and the future. In order to prepare students for the scientific and technological changes of the 21st century, teachers will need ongoing science professional development opportunities. Educational programs that are as dynamic as the societies in which teachers and students live will require new approaches—and research— on professional development. This research should suggest powerful and purposeful ways in which science teachers can enhance, refine, or reconstruct their practice.
