Conceptualized in France during the sixties, the Theory of Didactical Situations [TDS] is a pivotal framework for developing mathematics teaching and learning processes. Despite the increasing qualitative studies over the last ten years, there remains a dearth of analysis of its effects on mathematics education. Through a Grounded Formal Theory…

This review of the literature on aptitude by treatment interaction concentrates on studies which investigated two or more instructional treatments in a quantitative subject area--primarily mathematics--with different populations of students on whom measures of individual differences in aptitude were available. Designed to formulate some tentative…