This report examines issues related to the cost effectiveness of whole school reform. The first section discusses the development of whole school reform models, criteria for model adoption, and challenges of whole school reform for evaluation. The second section, "Comparing Effectiveness," looks at models for evaluation (experimental,…

Abuses and misuses of statistics are frequent. This digest attempts to warn against these in three broad classes of pitfalls: sources of bias, errors of methodology, and misinterpretation of results. Sources of bias are conditions or circumstances that affect the external validity of statistical results. In order for a researcher to make…

Schools are realizing that carefully collected and analyzed data represent the key to educational improvement. This digest outlines the most useful types of data to drive the school-improvement process, steps that must be taken to collect and analyze data, the role of administrators in guiding the data-driven reform process, and results that can…

Too few researchers understand what statistical significance testing does and does not do, and consequently their results are misinterpreted. This Digest explains the concept of statistical significance testing and discusses the meaning of probabilities, the concept of statistical significance, arguments against significance testing,…

This digest reviews scientific and methodological problems in special education research related to race, ethnicity, and socioeconomic status. The first section of the digest discusses the various definitions of race, ethnicity, culture, and socioeconomic status. The problems with current race classification and the difficulties in determining the…