The aim of the present study was to examine the kinds of developmental profiles of arithmetic fluency skills that can be identified across Grades 1-9 (ages 7-16) in a large Finnish sample (n = 2,518). The study also examined whether membership in the developmental profiles could be predicted using a comprehensive set of kindergarten-age factors,…

The aim of this single-case intervention study was to examine whether a conceptual knowledge-based strategy training would improve the accuracy of single-digit arithmetical calculation in a child with specific language impairment. The intervention concerned an 11-year-old Finnish-speaking child with specific language impairment. He was trained…