We define and describe how subitizing activity develops and relates to early quantifiers in mathematics. Subitizing is the direct perceptual apprehension and identification of the numerosity of a small group of items. Although subitizing is too often a neglected quantifier in educational practice, it has been extensively studied as a critical…

Over the past thirty years, researchers have documented a remarkable growth in children's social understanding between toddlerhood and the early school years. However, it is still unclear why some children's awareness of others' thoughts and feelings lags so far behind that of their peers. Based on research that spans an extended developmental…

This study assessed the adaptation of the Heidelberger-Kompetenz-Inventar (HKI) procedure for use with severely mentally handicapped young people in the German Democratic Republic. The HKI, which covers cognitive, social, and practical competencies and behavioral abilities, was found to be a sensitive and valid method of assessing changes achieved…

This book takes readers into the lives of urban and suburban adolescents for a close-up look at how they navigate the conflicting discourses and disciplinary practices of American cultural crosscurrents that flow through economic, kinship, religious, and political domains of American life. The book is distinctive in how it combines classic…