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This article reports results from the implementation of a model of professional development (PD) to help K-5 teachers develop the knowledge and skills to teach Computer Science (CS) in classrooms of diverse students, including students with high-incidence disabilities. This article describes our Inclusive CS model of PD, how we made the PD model available to teachers during a pandemic and presents quantitative and qualitative results about the impact of the PD on teachers’ knowledge, comfort, and beliefs related to teaching computer science to students. Results indicate that the teachers’ knowledge, comfort, beliefs and perceptions about teaching CS to students with disabilities significantly improved. Teachers’ knowledge and understanding of Universal Design for Learning for supporting students in learning about CS also improved. 

New computer science standards are being rapidly introduced at the elementary level but little is known about how to prepare teachers to learn and teach the content of these standards, or how to support students with disabilities in learning computer science. Accordingly, we designed and studied the Inclusive Computer Science Model of Professional Development to prepare teachers to integrate computer science for students with disabilities. This paper presents results from this design-based study to understand the factors that inhibited and enhanced teachers’ participation in the professional development and how participation in the professional development influenced teachers’ instruction and perceptions about teaching computer science to students with disabilities. Results revealed two inhibiting factors and one enhancing factor for participation. Further, although teachers did increase their integration of computer science for students with disabilities, it was challenging for teachers to learn and apply new computer science content and approaches for supporting students with disabilities at the same time. Future professional development efforts should focus on careful scaffolding and release of responsibility when preparing teachers to support students with disabilities in learning computer science.