The University of Missouri-Columbia is examining an innovative model of situated Professional Development (PD) and the contribution of controlled teaching experiences to teacher learning and, as a result, to student learning. The project is carrying out intensive research about an existing special PD summer institute (QuEST) that has been in existence for more than five years through a state Improving Teacher Quality Grants program. The project will do the following: (1) undertake more in-depth and targeted research to better understand the efficacy of the PD model and impacts on student learning; (2) develop and field test resources from the project that can produce broader impacts; and (3) explore potential scale-up of the model for diverse audiences. The overarching goals of the project are: (a) Implement a high-quality situated PD model for K-6 teachers in science; (b) Conduct a comprehensive and rigorous program of research to study the impacts of this model on teacher and student learning; and (c) Disseminate project outcomes to a variety of stakeholders to produce broader impacts. A comparison of two groups of teachers will be done. Both groups will experience a content (physics) and pedagogy learning experience during one week in the summer. During a second week, one group will experience "controlled teaching" of elementary students, while the other group will not. Teacher and student gains will be measured using a quantitative and qualitative, mixed-methods design.