The value of a program can be understood as referring not only to outcomes, but also to how those outcomes compare to the types and amounts of resources expended to produce the outcomes. Major potential mistakes and biases in assessing the worth of resources consumed, as well as the value of outcomes produced, are explored. Most of these occur…

The theorists whose work appears in this issue have confronted the exercise presented to them in vastly different ways. The editors of this journal asked these theorists to consider how they would evaluate the Bunche-Da Vinci program, and to make and specify assumptions about the program context. The primary task, however, was to describe "a…

Professional development has moved from the periphery of teachers' professional lives to center stage, clearly recognized today as one of the key factors that shape teachers' ability to reach and teach all students successfully. To be effective, any professional development program must pay close attention to changes in teacher classroom…