This fourth issue of INVESTIGATIONS IN SCIENCE EDUCATION (ISE), designed to provide a new perspective for viewing research articles and to aid in the improvement of writing research reports, includes abstracts prepared by science educators, bibliographical data, the research design and procedure used by the investigators including data, purpose, and rationale of the research, as well as detailed notes offered by the abstractor. Articles in the ISE are selected primarily from such sources as professional journals and reports of government-funded projects. With this issue, ISE inaugurates the so-called Cluster Reviews. These are reviews grouped together according to common concern. Four clusters of studies analyzed in this issue are: Instruction, Student Attitudes, Teacher Education, and Cognitive Development. (Author/EB)