Appeals to reform science education by policy makers are not new phenomena. To be sure, while science reform efforts have been ongoing occurrences for nearly six decades, perpetual educational reform efforts as a whole have been evolving and gaining momentum in number for more than a century. The general motivation for continual reform appears to…

Described is the importance of the cognitive level of science pupils, cognitive demands of the curriculum, and the social/cultural context within which curricula are planned. Emphasized is the historical division between planning and implementation. Suggestions for improvement are provided. (CW)