The early years of teaching are important for science teachers, but little is known about how science teachers develop professionally in their early years. This mixed methods study took a longitudinal view of the early years of teaching. Following 95 secondary science teachers over a 5-year period, this study examined the beliefs, pedagogical…

Professional knowledge is an important source of science teachers' actions in the classroom (e.g., personal professional content knowledge [pedagogical content knowledge, PCK] is the source of enacted PCK in the refined consensus model [RCM] for PCK). However, the evidence for this claim is ambiguous at best. This study applied a cross-lagged…

Science teachers' beliefs about teaching and learning are a vital component of teachers' professional competence and are often assumed to impact classroom practice. To date, these beliefs have been predominantly investigated regarding teaching and learning in general or for a particular science subject (e.g., physics). It remains to be determined…

Situated in the context of an in-service professional development (PD) program focused on Interdisciplinary Science Inquiry, this quantitative study tests the validity of and further explores the theoretical model adapted from Desimone's (2009), "Educational Researcher," 38, 181-199 conceptual framework on effectiveness of PD. The…

Research on learning progressions has led to advances in understanding student learning about big ideas in science, but teachers struggle to leverage the full potential of learning progressions for classroom instruction. Because learning progressions lay out how students' ideas change over a long period of time, learning progressions could help…

This mixed-method study examined the influence of metacognitive awareness on the change in preservice chemistry teachers' understandings of gas behavior in the context of multirepresentational (MR) instruction. The goal was to describe the types of understanding of gas behavior held by a group of participants with high metacognitive awareness (MA)…

This study investigates, through a cluster-randomized trial, the effectiveness of two approaches to increasing middle school students' science learning using a traditional science curriculum. Ninety schools were randomly assigned into one of three arms: (a) a treatment arm in which the textbook curriculum was modified based on four principles of…

The purpose of this study is to provide insight into short-term professionalization of teachers regarding teaching socioscientific issues (SSI). The study aimed to capture the development of science teachers' pedagogical content knowledge (PCK) for SSI teaching by enacting specially designed SSI curriculum materials. The study also explores…

Although pedagogical content knowledge (PCK) has become widely recognized as an essential part of the knowledge base for teaching, empirical evidence demonstrating a connection between PCK and teaching practice or student learning outcomes is mixed. In response, we argue for further attention to the measurement of dynamic (spontaneous or flexible,…

Many new science teachers are assigned to teach subjects in which they have not been prepared, a practice referred to as out-of-field (OOF) teaching. Teaching OOF has been shown to negatively influence instruction and constrain teachers' development. In this study, we explored the extent to which new secondary science teachers were assigned OOF…

This research studied a group of three preservice elementary teachers creating a narrated stop-motion animation (Slowmation) from start to finish in 3?hours to explain the challenging concept of "phases of the moon" to elementary school children. The research questions investigated the preservice teachers' learning before and after the…

With growing interest in the role of teachers as the key mediators between educational policies and outcomes, the importance of developing good measures of classroom processes has become increasingly apparent. Yet, collecting reliable and valid information about a construct as complex as instruction poses important conceptual and technical…

Engaging K-12 students in science-based inquiry is at the center of current science education reform efforts. Inquiry can best be taught through experiential, authentic science experiences, such as those provided by Student-Teacher-Scientist Partnerships (STSPs). However, very little is known about the impact of STSPs on teachers' and…

The Science Teachers Learning from Lesson Analysis (STeLLA) project is a videobased analysis-of-practice PD program aimed at improving teacher and student learning at the upper elementary level. The PD program developed and utilized two "lenses," a Science Content Storyline Lens and a Student Thinking Lens, to help teachers analyze science…

Those who study secondary science teachers are often concerned with preservice or in-service teacher development. Science teacher educators have acknowledged that this focus is limited, as the induction years of beginning teachers are an important component of teacher development. This mixed methods study focuses on the induction years of…