Presents an approach to quadratic functions that draws upon knowledge of linear functions by looking at the product of two linear functions. Then considers the quadratic function as the sum of three monomials. Potential advantages of each approach are discussed. (Contains 17 references.) (MDH)

Presents a learning model for science education and describes teacher interventions derived from the model to produce cognitive restructuring. Demonstrates how teacher interventions may be developed through a series of interventions, related activities, and comments. (MDH)