Registrants of college chemistry (Chem 103) whose permanent address indicated they lived in Maryland, Washington, D.C., or northern Virginia, were invited by letter to participate in a pre-course refresher consisting of listening to as many as seven audiotutorial tapes on the basic concepts and calculations of chemistry. Sixty-nine percent of…

The intended, perceived, implemented, and achieved curriculum of high school biology classes in Israel was studied using a variety of data sources and research methodologies. The intended curriculum was identified by analysis of commonly used laboratory manuals. The perceived curriculum was captured by procuring the views of teachers and students…

This catalog contains descriptions of the science education programs and materials in the National Diffusion Network (NDN). These programs and materials are available to school systems or other educational institutions for implementation in their classrooms. Some programs may be able to offer consultant services and limited assistance with the…

These programs are available to school systems or other educational institutions for implementation in the classroom. Some programs may be able to offer consultant services and limited assistance with the training and materials associated with installing one of these programs in schools. Information about the National Diffusion Network (NDN) is…