This study aimed to address the need for a comprehensive assessment tool to evaluate the mathematical abilities of first-grade students through cognitive diagnostic assessment (CDA). The primary challenge involved in this endeavor was to delineate the specific cognitive skills and sub-skills pertinent to first-grade mathematics (FG-M) and to…

In British Columbia, Canada, two population-based databases have been linked at the level of the individual child: the "Early Development Instrument", a Kindergarten school readiness measure; and the "Foundation Skills Assessment", a Grade Four academic assessment. Utilising these linked data, we explored the early school…