In this article, the authors consider what can be learned from limited forms of evidence, for purposes of accountability and program improvement. They focus on examining whether differences in teacher value-added scores exist by type of teacher preparation institution attended and years of teacher experience.This study shows that there is potential in using value-added models as an additional form of evidence that can inform our understanding of the effectiveness of teacher preparation programs in producing teachers who can positively affect student learning. The authors concludes by arguing for collective responsibility among teacher education institutions, professional organizations, and state and local agencies as they respond to the demand for increased accountability.