Previous studies have found that children have difficulty solving proportional reasoning problems involving discrete units until 10 to 12 years of age, but can solve parallel problems involving continuous quantities by 6 years of age. The present studies examine where children go wrong in processing proportions that involve discrete quantities. A…

The focus of this article is intervention for third-grade students with serious mathematics deficits at third grade. In third grade, such deficits are clearly established, and identification of mathematics disabilities typically begins. We provide background information on two aspects of mathematical cognition that present major challenges for…

Providing choice to individual students with attention-deficit/hyperactivity disorder (ADHD) has previously been demonstrated (in single-subject research) to reduce undesirable behavior but has failed to demonstrate gains that are independent of task difficulty or interests/ preferences. We examined choice of feedback type on a computerized math…