Much of what teachers need to know to be successful is invisible to lay observers, leading to the view that teaching requires little formal study and to frequent disdain for teacher education programs. The weakness of traditional program models that are collections of largely unrelated courses reinforce this low regard. This article argues that we have learned a great deal about how to create stronger, more effective teacher education programs. Three critical components of such programs include tight coherence and integration among courses and between course work and clinical work in schools, extensive and intensely supervised clinical work integrated with course work using pedagogies that link theory and practice, and closer, proactive relationships with schools that serve diverse learners effectively and develop and model good teaching. The article also urges that schools of education should resist pressures to water down preparation, which ultimately undermine the preparation of entering teachers, the reputation of schools of education, and the strength of the profession.

This article draws out the implications for school and classroom practices of an emerging consensus about the science of learning and development, outlined in a recent synthesis of the research. Situating the review in a developmental systems framework, we synthesize evidence from the learning sciences and several branches of educational research regarding well-vetted strategies that support the kinds of relationships and learning opportunities needed to promote children's well-being, healthy development, and transferable learning. In addition, we review research regarding practices that can help educators respond to individual variability, address adversity, and support resilience, such that schools can enable all children to find positive pathways to adulthood.This work is situated in a relational developmental systems framework that looks at the "mutually influential relations between individuals and contexts" (Lerner & Callina, 2013, p. 373). This framework makes it clear how children's development and learning are shaped by interactions among the environmental factors, relationships, and learning opportunities they experience, both in and out of school, along with physical, psychological, cognitive, social, and emotional processes that influence one another-both biologically and functionally-as they enable or undermine learning (Fischer & Bidell, 2006;Rose, Rouhani, and Fischer, 2013). Although our society and our schools often compartmentalize these developmental processes and treat them as distinct from one another-and treat the child as distinct from the many contexts she experiences-the sciences of learning and development demonstate how tightly interrelated they are and how they jointly produce the outcomes for which educators are responsible.Key insights from the science of learning and development are that the brain and the development of intelligences and capacities are malleable, and the "development of the brain is an experience-dependent process" (Cantor et al., 2018, p. 5), which activates neural pathways that permit new kinds of thinking and

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Policies must keep pace with new ideas about what, when, and how teachers learn and must focus on developing schools' and teachers' capacities to be responsible for student learning.

Using data from a 50-state survey of policies, state case study analyses, the 1993-94 Schools and Staffing Surveys (SASS), and the National Assessment of Educational Progress (NAEP), this study examines the ways in which teacher qualifications and other school inputs are related to student achievement across states. The findings of both the qualitative and quantitative analyses suggest that policy investments in the quality of teachers may be related to improvements in student performance. Quantitative analyses indicate that measures of teacher preparation and certification are by far the strongest correlates of student achievement in reading and mathematics, both before and after controlling for student poverty and language status. State policy surveys and case study data are used to evaluate policies that influence the overall level of teacher qualifications within and across states. This analysis suggests that policies adopted by states regarding teacher education, licensing, hiring, and professional development may make an important difference in the qualifications and capacities that teachers bring to their work. The implications for state efforts to enhance quality and equity in public education are discussed.