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Abstract Recent instructional reforms in science education aim to change the way students engage in learning in the discipline, as they describe that students are to engage with disciplinary core ideas, crosscutting concepts, and the practices of science to make sense of phenomena (NRC, 2012). For such sensemaking to become a reality, there is a need to understand the ways in which students' thinking can be maintained throughout the trajectory of science lessons. Past research in this area tends to foreground either the curriculum or teachers' practices. We propose a more comprehensive view of science instruction, one that requires attention to teachers' practice, the instructional task, and students' engagement. In this study, by examining the implementation of the same lesson across three different classrooms, our analysis of classroom videos and artifacts of students' work revealed how the interaction of teachers' practices, students' intellectual engagement, and a cognitively demanding task together support rigorous instruction. Our analyses shed light on their interaction that shapes opportunities for students' thinking and sensemaking throughout the trajectory of a science lesson. The findings provide implications for ways to promote rigorous opportunities for students' learning in science classrooms. 

As part of a larger effort to understand the impact of professional development (PD) on teachers’ thinking and practices, this research explores changes in epistemic orientation (and associated practices) of two cohorts of secondary science teachers as they were involved in a longitudinal PD. To measure epistemic orientation, Epistemic Orientation toward Teaching Science surveys were administered at three-time points and teachers’ classrooms were observed. Findings suggest that change in epistemic orientation occurred for teachers who engaged in two years of PD, but that one year was not sufficient to engender such changes in epistemic orientation or instructional practice. These findings speak to the need for continuous, highquality, longitudinal PD. 

A teacher’s noticing or their ability to see and interpret classroom events is an important component of their expertise. Examination of these noticings is a way to understand changes in their learning over time. In this research, we examine changes in teacher noticing of classroom instruction for two groups that participated in slightly different professional development experiences to understand how this PD shaped their personal domain of learning. Findings suggest that both programs shaped teacher noticing and learning but in different ways. 

Current reform efforts in science education focus on creating environments where students grapple with and negotiate their own understandings and mechanistic explanations of scientific phenomena by using their knowledge of disciplinary content and science practices. In order to support this reformed vision, effective professional development (PD) for science teachers is critical. If PD is to shape teachers’ practice, teachers must experience a change in attitudes and beliefs. The research presented here explores the epistemic orientation of three secondary science teacher cohorts who were supported in different iterations in a larger professional development study. The epistemic orientation toward teaching science survey was administered at three time points for each cohort and paired sample t-tests were performed to analyze composite and dimensional scores. Our analysis revealed that change in epistemic orientation occurred for teachers who engaged in two years of supportive PD, but that one year of support was not sufficient to engender change in epistemic orientations. These findings further support the need for continuous, high-quality, longitudinal PD when the goal is a shift in science teachers’ epistemological beliefs and teaching practices. 

Science learning is thought to be best supported when students are positioned as epistemic agents. Using a case study approach, we explore the experiences of one Black middle school girl and her epistemic efforts and the ways in which her group members’ responses to her efforts either supported or constrained her epistemic agency during small group work in two argumentation lessons. Our findings show that Jessie’s epistemic efforts were not often taken up by her peers in ways that support her epistemic agency, findings that have implications for student learning and engagement in terms of the epistemic work we ask students to engage in, and the instructional strategies that support this work. 

Reform efforts targeting science instruction emphasize that students should develop scientific proficiency that empowers them to collaboratively negotiate science ideas as they develop meaningful understandings about science phenomena through science practices. The lessons teachers design and enact play a critical role in engaging students in rigorous science learning. Collaborative design, in which teachers work together to design, enact, and reflect on their teaching, holds potential to support teachers’ learning, but scarce research examines the pathways by which collaborative design can influence teachers’ instructional practices. Examining the teaching and reflective thinking of two science teachers who engaged in collaborative design activities over two years, we found that their enactment practices became more supportive of students’ rigorous learning over time, and that they perceived collaborative efforts with teacher educators and partner teachers to plan lessons and analyze videos of instruction as supportive of their learning to enact rigorous instruction. 

This work follows a group of four science teachers in the second year of an intensive PD. Our analyses revealed two distinct variations in their instruction. These differences were accompanied by similar differences in their instructional vision. We argue that instructional vision can illuminate teachers’ thinking about their work, insights that may be useful in helping PD facilitators better hone such experiences. 

Recent educational reforms conceptualize science classrooms as spaces where students engage in Science-as-Practice to develop deep understandings of scientific phenomena. When students engage in Science-as-Practice they are constructing explanations, arguing from evidence, and evaluating and communicating information to develop scientific knowledge (NGSS Lead States, 2013). This process of learning requires a focus on productive science talk in which students grapple with and socially negotiate their ideas (Kelly, 2014) through interactions involving talk, joint attention, and shared activity aimed at building, negotiating, and refining new understandings of phenomena and relevant science concepts (Ford, 2015; Michaels & O’Connor, 2012). Productive talk requires the ‘nimble’ involvement of the teacher to help students productively contribute their ideas to the class and use them as resources to drive instructional activities supporting the development and refinement of more sophisticated scientific understandings (Christodoulou & Osborne, 2014; González‐Howard & McNeill, 2020). 

This paper examined changes in students' biological reasoning, scientific sensemaking, valuing of science, and fascination in science over the course of a school year after their teacher participated in one of the two professional development programs. One professional development (PD) group emphasized teacher collaboration in revising materials for their classroom, while the other emphasized revision of materials without collaboration among teachers. Results from repeated measures ANOVA showed improvements in students' biological reasoning from the beginning to end of the school year when in classrooms led by teachers who participated in the collaboration-focused PD. Students' scientific sensemaking, valuing of science, or science fascination remained stable across the school year across both PD groups. 

This research employs the lenses of epistemological resources and framing to examine the complexities of one teacher’s efforts to position his middle-school biology students as sensemakers. Through interviews, classroom observations, and document analysis, we trace the teacher’s activation of varied epistemological resources and how such resources positioned students’ efforts throughout the lesson. While the launch of tasks was framed as an opportunity for “doing science,” this framing became less stable when the teacher engaged with students in small group work and during the wrap up that were focused on the “right answer.” Specific phases of the lesson served as a context that influenced the epistemological resources activated, helping us understand the varied, dynamic, and sometimes contradictory nature of the teacher’s moves and their consequences on students’ framing of their efforts.