Abstracts of most of the papers, symposia, and poster sessions presented at the 59th conference of the National Association for Research in Science Teaching (NARST) are provided. Subject areas addressed include: instructional practices in secondary school science; research on computers in science learning; teacher's professional knowledge and conceptual changes in students; factors influencing student science achievement; contexts of science learning; research on classroom and school environment; student attitudes; secondary science teacher education; computer applications; assessments (of test material); the Second International Science Study; process-product studies in middle school science classes; logical thinking in science; alternatives in science education; developments in style and purpose of research on the learning of science; science process skills; computer oriented programs; undergraduate science education; administration of science programs (a policy perspective); meta-analysis of research on the effectiveness of "new" science curricula; cognitive development; student concepts in science; teachers' perceptions and interests; science and writing (linking research with classroom models); issues related to sex differences; science textbooks; preservice science teacher education; science education in non-traditional settings; science teacher education program evaluation; students' misconceptions; college science teaching; systematic representation of biology knowledge; science curriculum implementation; science careers; technology in science education; goals and issues; and other areas. (JN)