Discusses key processes in conducting qualitative research: problem definition, gaining access to collect data, modes of data collection, modes of analysis, and presentation of findings. Compares qualitative with quantitative research methods. (JN)

Argues that secondary analysis of existing data sets provides an important opportunity for science education researchers. Reviews basic arguments for secondary analysis (quality, cost, scientific merit of multiple analyses of a common data set), discusses new forces fostering these analyses, and provides three examples of secondary analysis…

Argues that science educators often face the problem of abnormal distributions when conducting large-scale assessments or evaluating national curriculum projects that require complex sampling plans. Examines the precision of science test scores. (DDR)

Reports on a study that uses psychometric modeling to rank the appeal of a variety of children's astronomical ideas on a single uniform scale. Findings support the view that alternative conceptions may be markers of progress toward understanding. Contains 82 references. (DDR)