Discussion of constructivism focuses on instructional systems design (ISD) and how it can help develop constructivist instruction. Highlights include ISD limitations; objectives and learning analysis, including Competency-Based Teacher Education and levels of learning; task analysis; and formative evaluation processes. (23 references) (LRW)

Describes a study that assessed the impact of four half-hour science programs for fourth graders aired on commercial radio in a causal-comparative between-groups study with prebroadcast and postbroadcast questionnaires. Formative and summative evaluation of the programs is described, and results are reviewed. (21 references) (LRW)

Discusses changes needed in the field of educational technology and recommends future directions. Topics discussed include instructional theories; descriptive versus prescriptive theories; analysis versus synthesis; a formative evaluation approach to research; the relationship of research and development; organizational methods for instruction;…