Results of research on the acquisition of counting skills in children is presented. The material, originally published in the Soviet Journal "Questions of Psychology," was deemed an important document that should be translated and made accessible to English readers. The question of how basic, extended processes are…

Presents a study of the acquisition and development of information coordination ability. Examines students' composition of texts comparing two cultural groups after reading either one text describing both or a separate text on each. Concludes that older students used more complex information integration levels, whereas all subjects performed…

After observing secondary school students having great difficulty learning geometry in their classes, Dutch educators Pierre van Hiele and Dina van Hiele-Geldof developed a theoretical model involving five levels of thought development in geometry. It is the purpose of this monograph to present English translations of some significant works of the…