Examines the relationships between mental maturity and achievement in three types of science concepts-classificational, correlational, and theoretical. (AL)

Defines five levels between concrete and formal operation in the development of the concept of controlling variables. The sample, methodology and research on which the work is based is described in SE 519 500. (CP)

Questions investigated in this study deal with relationships between map problem difficulty and students' acquired level of intellectual development, the effects of sequential mastery of map concepts, and the optimum age to introduce certain map concepts in the geography curriculum. In the main investigation, which covered varied selected,…

The experiments reviewed in this paper give strong reasons for concluding that the order in which things are learned, the range of exemplification of structural principles, and the introduction of a carefully judged amount of conflict may be critical to reaching an appropriate kind and level of learning. (Author/SJL)

Reported is the production of an instructional methodology harmonizing with Piagetian theory and enabling teenage students, including those initially mismatched to the task, to understand the mole, as revealed by their performances on a test of basic skills considered fundamental to that concept. (DS)