The Campbellian validity typology has been used as a foundation for outcome evaluation and for developing evidence-based interventions for decades. As such, randomized control trials were preferred for outcome evaluation. However, some evaluators disagree with the validity typology's argument that randomized controlled trials as the best design…

The field of specific learning disabilities (SLDs) has faced three kinds of challenges. "Constitutional challenges" arise from classification and definitional complexities, identification issues, comorbidity, and ontological debates. "Internal challenges" include the inherent difficulties of scientific thinking that compete…

The evolution of a pervasive negative view of immigrants and its role in classroom achievement in the United States is described in this paper; beginning in the crowded urban secondary classrooms of the 1800s, to IQ testing in the 1920s that identified many as morons, imbeciles, or idiots, and to an English-only view that permeates public and…

I present my perspective on the design process in this article, arguing for a focus on student learning and "slow design" that stems from knowledge of mathematics and their support system in the learning process. I have a question about the design process academization and task design research direction. Numerous examples from my work at…

Identifying potentially effective practices for improving outcomes for individuals with autism spectrum disorder (ASD) is a complex process. In this article, we respond to recent reviews of evidence-based practices for individuals with ASD. We identify possible problems and make suggestions in relation to identifying well-specified practices,…

International large-scale student assessments (ILSAs) in education represent a valuable source of information for policy-makers, not only on student achievements, but also on their relationship with different contextual factors. The results are partly described in the official studies' reports; more can be derived from the publicly released data…

In this rejoinder, the authors describe the aim of the original study as an effort to conduct a critical test of an important postulate underlying the Cross-Battery Assessment PSW approach (XBA PSW; Kranzler, Floyd, Benson, Zaboski, & Thibodaux, this issue). The authors used classification agreement analysis to examine the concordance between…

Texas educates the second-most students in the country with a home language other than English. Students are identified as English learners (EL) based on a state language assessment that evaluates a student's primary language other than English to determine if the student qualifies for additional support to develop the English language skills…