Maintains that young children learn to think when they act on objects, thus developing what Piaget refers to as physical and logico-mathematical knowledge. Teachers can encourage thinking/mental action by creating situations that are personally meaningful to the children, by providing decision-making opportunities, and by providing opportunities…

Five- to six-year-old children estimated the size of Euclidian objects using an addition rule of Height plus Width, rather than a multiplying rule. Within the framework of information integration theory, tested whether intensive handling of objects would facilitate shift from addition rule to multiplication rule. Found that following handling,…