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There is a need for more K-12 computer science (CS) teachers. The need to scale teacher professional development (PD) points the CS education community towards virtual learning, and prior work shows that in-person PD with a diffuse schedule is more successful than condensed schedules. There is currently little research about virtual K-12 CS PD with a diffuse schedule. The pandemic served as a forced opportunity to explore the design and implementation of a diffuse-scheduled virtual PD for two small, equally-sized cohorts of middle school (grades 5-8) teachers; one from a metropolitan school district and another from across the United States. Our findings reveal several important post-pandemic design implications for future CS PD programs. First, the teachers’ CS knowledge and attitudes significantly increased in both cohorts. Second, there were no significant differences in attitudes or achievement between the cohorts. Third, the teachers in the virtual PD showed as good changes or better in attitude than those in a prior in-person PD. Finally, both cohorts were largely positive about the change from a few intensive PD days to a few hours a week for several weeks, even as they joined from vacations. 

Given the importance of broadening participation in the field of computing, goals of supporting personal expression and developing a sense of belonging must live alongside the goals of conceptual knowledge and developing disciplinary expertise. Integrating opportunities for students to be creative in how they enact computing ideas plays an important role when designing curricula. We examine how student creativity, as expressed through theme and the use of costumes, backdrops, and narrative in Scratch projects, is affected by using a themed starter project. Starter projects are Scratch projects that include a set of sprites and backdrops aligned to a theme (e.g. baseball), but no code. Using within-group and between- group comparisons, we establish a baseline of what students do when they are given a starter project and explore how their projects differ in the absence of a starter project. This work contributes to our understanding of the impacts of structured elements within open-ended learning tasks and how we can design computer science learning experiences for students that promote opportunities for self-expression while engaging them in computing. 

Background and Context: Educators make consequential curricu- lar decisions, often with little support, particularly as it relates to equity and how to support all students. Objective: This paper investigates the use of a rubric to support educators evaluating computer science curricula, especially with regards to equity. Method: Seventeen in-service elementary teachers evaluated a computer science curriculum with and without the Teacher Accessibility, Equity, and Content (TEC) Rubric. We examine tea- chers’ responses to prompts and completed TEC Rubrics to under- stand if and how the rubric supported their evaluations. Findings: The TEC Rubric helped teachers attend not only to curri- cular factors related to instructional design but also to issues of equity and accessibility and to identify opportunities to draw on the cultural resources of students and their communities. Implications: We contribute evidence supporting curricular evalua- tion instruments, specifically the TEC Rubric, and their use to direct teachers’ attention to attributes of equitable computing instruction. 

Quantum computing is poised to revolutionize some critical intractable computing problems; but to fully take advantage of this computation, computer scientists will need to learn to program in a new way, with new constraints. The challenge in developing a quantum computing curriculum for younger learners is that two dominant approaches, teaching via the underlying quantum physical phenomenon or the mathematical operations that emerge from those phenomenon, require extensive technical knowledge. Our goal is to extract some of the essential insights in the principles of quantum computing and present them in contexts that a broad audience can understand. In this study, we explore how to teach the concept of quantum reversibility. Our interdisciplinary science, science education, computer science education, and computer science team is co-creating quantum computing (QC) learning trajectories (LT), educational materials, and activities for young learners. We present a draft LT for reversibility, the materials that both influenced it and were influenced by it, as well as an analysis of student work and a revised LT. We find that for clear cases, many 8-9 year old students understand reversibility in ways that align with quantum computation. However, when there are less clear-cut cases, students show a level of sophistication in their argumentation that aligns with the rules of reversibility for quantum computing even when their decisions do not match. In particular, students did not utilize the idea of a closed system, analyzing the effects to every item in the system. This blurred the distinction between between reversing (undoing) an action, recycling to reproduce identical items with some of the same materials, or replacing used items with new ones. In addition, some students allowed for not restoring all aspects of the original items, just the ones critical to their core functionality. We then present a revised learning trajectory that incorporates these concepts. 

Participatory design is an essential design strategy for creating artifacts and experiences that reflect the voices of the population being designed for and with. The participatory design process can serve not only to research resulting artifacts but also as an empowering activity for those who participate. This paper explores how participatory design can serve as a context for young participants to enact and voice their emerging identities and reveals how different participatory design activities have unique affordances for supporting this identity enactment. Focusing on a group of 12 and 13-year-old African American girls, this paper presents a case study showing how participatory design activities served as venues for the girls to reflect characteristics of their current identities, project future identities, and apply aspects of their identities to shape materials for others. In doing so, we contribute a case study showing how participatory design allows participants to enact their identities, helping researchers gain insight into characteristics of those they are designing with and for. This paper advances our understanding of participatory design as a design approach for youth, especially as it relates to issues of broadening participation, identity, and equity.