The National Science Foundation (NSF) awarded a $1,128,652 federal Project Grant (CFDA 47.076 - STEM Education) to Trustees of Boston College to implement the "Building Teacher Capacity for Teaching Across Science Disciplines Using Smart Greenhouses" project. This 3-year project aims to engage teachers in professional development to support their use of a transdisciplinary approach, integrating engineering, computer science, and horticulture, as students design and build smart greenhouses. The project will recruit 60 teachers and 580 students across rural and urban districts in three states to participate in the professional development and associated curriculum. An external evaluation subcontract was awarded to Education Development Center, Inc. (EDC) to provide formative and summative assessment of the project's implementation and impact. The project seeks to investigate how teachers learn about and implement transdisciplinary teaching, and how this approach affects students' STEM interest, identity, competence, and connections across disciplines.