The goal of the present article is to synthesize findings to date from the Delaware Longitudinal Study of Fraction Learning. The study followed a large cohort of children (N = 536) between Grades 3 and 6. The findings showed that many students, especially those with diagnosed learning disabilities, made minimal growth in fraction knowledge and…

High comorbidity rates between reading disorder (RD) and mathematics disorder (MD) indicate that, although the cognitive core deficits underlying these disorders are distinct, additional domain-general risk factors might be shared between the disorders. Three domain-general cognitive abilities were investigated in children with RD and MD:…

This study investigated the effectiveness of five commonly administered academic testing accommodations on reading and math performance in children with Attention-deficit/Hyperactivity Disorder (ADHD). A total of 96 parents of 3rd-8th grade students with ADHD participated. More than half of the sample also had parent-reported learning difficulties…

Three cohorts of third-grade students (N = 813) were evaluated on achievement, cognitive abilities, and behavioral attention according to contrasting research traditions in defining math learning disability (LD) status: low achievement versus extremely low achievement and IQ-achievement discrepant versus strictly low-achieving LD. We use methods…

Exceptionally bright and capable students with learning disabilities, often referred to as being twice exceptional, may fail to meet learning disabilities criteria if a strict psychometric approach is taken. To make an accurate diagnosis, an evaluator must consider their special circumstances, unique abilities, educational histories, and…