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,…

The 2002 reauthorization of the Elementary and Secondary Education Act mandates that schools receiving federal funding must desegregate their student performance data by race, gender, and socioeconomic status in order to provide progress information to the community and state. Data-driven decision making is particularly important in urban schools…

Student ratings of instruction are widely used as a basis for personnel decisions and faculty development recommendations. This digest discusses concerns about the validity of student ratings and presents a case for their use in teacher evaluation. There are several strong arguments for using student ratings to evaluate teachers. Students are in a…