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<p>Teacher talk is a powerful pedagogical tool in the science classroom. Educators use their talk to provide information, guide discussions, check for understanding, and develop students' scientific identities. However, few researchers have investigated how teachers use their talk during an integrated science, technology, engineering, and math (STEM) unit. This three-study dissertation investigates how teachers use their talk to introduce a new discipline to students and how their talk affects student learning and engagement during an integrated STEM unit. I designed these research studies to answer the overall question: What talk moves do teachers use during an integrated STEM unit, and how does the teacher talk affect student engagement and learning? Study 1 is a multiple case study investigating how teachers guide classroom discussions and how that teacher talk affects student learning during the integrated STEM unit. Results demonstrate the importance of teachers carefully balancing dialogic discussions and providing information during these instructional units. Study 2 is an interpretative qualitative study that investigates how a teacher's autonomy-supportive and/or suppressive talk affects student engagement during the integrated unit. Results show that each student responded differently to the teacher talk that occurred in the classroom. While some became more engaged when the teacher used autonomy-supportive talk, others became disengaged during the same type of talk. Study 3 is a multiple case study investigating the talk moves teachers use when integrating engineering concepts in the curriculum. Results show that the two teachers requested student participation in the conversation about engineering more during the first lesson of the unit than the last. In addition, only one of the two teachers in this study incorporated talk about engineering into the science lessons. The last chapter of this dissertation synthesizes the data from all three studies. This chapter identifies some common themes across the studies, including the complex nature of teacher talk, the influence of non-talk factors, and the importance of dialogic discussion. This chapter also identifies some implications for teaching, including the need to restructure the curriculum units and to coach teachers during their first implementation of an integrated STEM unit.</p>

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Part I of the study examines the differences between two environmental assessment methods for the K‐12 education sector: the United States Green Building Council’s (USGBC) LEED Schools Version 3.0 and the British Research Establishment’s (BRE) BREEAM Education issue 2.0. Credit requirements are compared side‐by‐side and against recommendations from researchers in areas such as acoustics, lighting and indoor environment quality. Strengths in the two schemes and areas for improvement are highlighted, with acknowledgement that each scheme offers components and techniques from which the other could benefit. Part II of the study introduces the Howard C. Reiche Community School in Portland, Maine. Designed as an open‐plan school in the 1970’s this configuration is currently seen as a barrier to teaching and learning in the school which is slated for renovation by the Portland Public School District. Part III of the study looks towards precedents in education which have followed either the LEED or BREEAM assessment methods and Part IV of the study provides a design proposal for the Howard C. Reiche Community School’s renovation.

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