Despite the ever-increasing number of online professional development (OPD) programs, relatively few studies have been conducted to examine the efficacy of such programs for teachers and students. This manuscript presents findings from an impact study of OPD courses in fractions, algebraic thinking, and measurement on 79 fifth grade teachers'…

Research on informant discrepancies has increasingly utilized difference scores. This article demonstrates the statistical equivalence of regression models using difference scores (raw or standardized) and regression models using separate scores for each informant to show that interpretations should be consistent with both models. First,…

This study addresses preservice teachers' perceptions toward online experiences, specifically, their perceptions about utilizing an online science methods curriculum versus a traditional methods curriculum. Thirty-eight senior level preservice teachers at a midwestern U.S. university completed surveys about their experiences during their methods…

Geospatial and Robotics Technologies for the 21st Century (GEAR-Tech-21), teaches science, technology, engineering and mathematics (STEM) through robotics, global positioning systems (GPS), and geographic information systems (GIS) activities for youth in grades 5-8. Participants use a robotics kit, handheld GPS devices, and GIS technology to…

This is the first examination of exemplary evaluation under a new editorial approach, in which the authors are attempting not only to report how the evaluation was conducted and to explain the rationale for design and implementation but also to examine the conditions, events, or actions that might have contributed to its exemplary status. This…

The authors were asked to find out whether "On Our Way to English" ("OWE"), a supplementary, text-based product to help elementary school students learn to read and speak English was more effective in a California and a Texas school district than the materials the districts already had in place. They conducted an experiment…