"Throughout the Framework are brief numbered descriptions of the learning experiences that must occur at each grade level, nine through twelve. Each of these descriptions corresponds to a "micro-unit," a collection of carefully selected laboratory activities, readings, and assessment items designed to achieve the National Science Education Standards. A micro-unit requires an average of three class periods to complete."--p.xi.

This report presents the findings of a multiyear study of the effectiveness of reform-oriented science and mathematics instruction.