This study investigates the effects of adapting elementary science instruction to students' entering achievement levels on three dependent variables: (1) performance on tests of science content knowledge; (2) mastery of lesson objectives; and (3) attitude toward science. Subjects were 235 sixth graders from four elementary schools in a small,…

The foundations of knowledge by tradition have been treated analytically, and knowledge has been characterized as a theoretical subject. This article introduces a steering mechanism as the prerequisite for a study of knowledge work and maintenance on empirical grounds. Knowledge is treated synthetically, that is, as something that exists only…

The development of economic reasoning in young children is examined from the theoretical perspective of Piaget's work on cognitive development. To determine a possible correlation between grade level and the type of reasoning children use to approach economic problems, 70 urban children, preschool through grade 3, answered questions which measured…