Some form of a short interrupted time series (ITS) is often used to evaluate state and national programs. An ITS design with a single treatment group assumes that the pretest functional form can be validly estimated and extrapolated into the postintervention period where it provides a valid counterfactual. This assumption is problematic. Ambiguous…

Examines prevailing definitions of coherence in text. Cites writing samples from the National Assessment of Educational Progress to illustrate how coherence at the paragraph level must supersede coherence between sentences. (HTH)

Four guidelines that make tables more effective data displays are presented. The need for these guidelines and their application are illustrated with data from the National Assessment of Educational Progress (NAEP). A theoretical structure is presented to help develop test items to assess students' proficiency in extracting information from…