Analyses were conducted with second graders, drawn from an ongoing multi-cohort randomized controlled trial (RCT), who had been identified for RCT entry based on comorbid reading comprehension and word-problem solving difficulty. To estimate pandemic learning loss, we contrasted fall performance for 3 cohorts: fall of 2019 (pre-pandemic; n = 47),…

The purpose of this analysis was to examine achievement gaps on fractions for very-low-performing students as a function of whether they receive inclusive fraction instruction or specialized fraction intervention and with the shift to Common Core State Standards (CCSS). In three randomized control trials conducted in 3 consecutive years, 203…

In this article, the authors consider the power and limitations of responsiveness-to-intervention (RTI) for reducing the need for ongoing and intensive services for the segment of the school population traditionally identified as having a learning disability in mathematics. To assess the robustness of RTI, the authors describe four studies with…

The primary purpose of this study was to assess the effects of strategic counting instruction, with and without deliberate practice with those counting strategies, on number combination (NC) skill among students with mathematics difficulties (MD). Students (n = 150) were stratified on MD status (i.e., MD alone versus MD with reading difficulty)…

Examines the effects of a dyadic peer-mediated treatment, Peer-Assisted Learning Strategies (PALS), on first-grade children's mathematics development. Results indicated that treatment implementation was strong; teachers judged PALS to be effective and generally feasible; and students with and without disabilities, at all points along the…

A process for readying students to change from special education to regular mathematics classrooms was implemented and validated in a study involving 42 students with mild disabilities in experimental and control groups. Preparation appeared to enhance achievement while in special education, but not in the regular class. (SLD)