Investigates several key statements from Piaget's cognitive psychology and their meaning for science education. Concludes that teaching must be conducted as reversibly as possible so that when the teacher presents his own assimilation schemata it will be equilibrated by the pupils' schemata. (GA)

Reported is an Aptitude Treatment Instruction (ATI) Study designed to evaluate the aptitude of verbal comprehension in terms of two unitary complex science diagram types: a single complex block word diagram and a single complex picture word diagram.. ATI theory and research indicate that different effective instructional treatments tend to help…