This article describes a research model that can help curriculum developers document both curriculum practices in the schools and perceptions of those practices by scholars, state department of education staff, teachers, and others. The model was developed to guide the collection of research data for John Goodlad's "Study of Schooling." (PP)

Describes the use of videodisk technology to deliver instruction to preservice and in-service teachers for mastery of earth science concepts, and discusses its use as a research tool to improve teacher preparation in science education instructional methods for elementary schools. A science teaching model that underlies the research program is…