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IntroductionIn recent years, STEAM (science, technology, engineering, arts, and math) education has become an increasingly popular tool to promote student learning and engagement across disciplines. However, researchers and practitioners continue to note the lack of clarity around definitions of STEAM, its intended purpose, and the nature of discipline integration. In this paper, we explore teachers' understandings and implementation of STEAM as they participated in a teacher professional learning program.MethodsUsing a mixed-methods approach, we analyzed data from 4 years of program implementation with K-12 teachers across multiple schools and districts (n = 61).ResultsParticipants' understanding of STEAM was deepened through their involvement in the professional learning program, with many reflecting on their initial, often shallow, (mis)conceptualizations of STEAM. Using an integration continuum developed by the authors, we identified ways in which integration varied across the STEAM lessons teachers developed, contextualizing these findings within the changing educational landscape of the COVID-19 pandemic, as teachers transitioned between remote, hybrid, and in-person instruction. Participants shared their reflections on the personal, professional, and contextual factors that supported and hindered successful STEAM integration.DiscussionWe found that, when provided with sustained, collaborative pedagogical and material support, teachers could successfully improve their understanding of STEAM and implement STEAM lessons tailored to their grade-level and disciplinary context. Our findings reinforce that teachers need support, autonomy, and flexibility to adopt an approach to STEAM integration that best fits their classroom and school context. We discuss the implications of these findings for researchers and practitioners working to provide effective STEAM teacher professional learning.

Evidence-centered design (ECD) is an assessment framework tailored to provide structure and rigor to the assessment development process, and also to generate evidence of assessment validity by tightly coupling assessment tasks with focal knowledge, skills, and abilities (FKSAs). This framework is particularly well-suited to FKSAs that are complex and multi-part (Mislevy and Haertel, 2006), as is the case with much of the focal content within the computer science (CS) domain. This paper presents an applied case of ECD used to guide assessment development in the context of a redesigned introductory CS curriculum. In order to measure student learning of CS skills and content taught through the curriculum, knowledge assessments were written and piloted. The use of ECD provided an organizational framework for assessment development efforts, offering assessment developers a clear set of steps with accompanying documentation and decision points, as well as providing robust validity evidence for the assessment. The description of an application of ECD for assessment development within the context of an introductory CS course illustrates its utility and effectiveness, and also provides a guide for researchers carrying out related work.