In a world where the policymakers now clamor for simple quantitative evaluations linking teacher preparation to pupil achievement scores, we are reminded that the causal chain from teacher preparation to in-service performance and student achievement is fraught with externalities, complexities and a less than equal playing field.

In a world where the policymakers now clamor for simple quantitative evaluations linking teacher preparation to pupil achievement scores, we are reminded that the causal chain from teacher preparation to in-service performance and student achievement is fraught with externalities, complexities and a less than equal playing field.