The aim of this study is to advance current understanding of the transactional processes that characterize students' sense-making practices when they are confronted with multiple representations of scientific phenomena. Data for the study are derived from a design experiment that involves a technology-rich, inquiry-based sequence of…

The purpose of this project was to investigate the effects of virtual versus physical manipulation using a simulation-based laboratory activity (SBL) and a microcomputer-based laboratory activity (MBL). Both the SBL and the MBL used computers to collect, graph, and analyze data. A major difference was that the MBL allowed the students to…

The purpose of this study was to understand how students utilized multiple representations to learn and explain science concepts, in this case the human breathing mechanism. The study was conducted with Grade 11 students in a human biology class. Semistructured interviews and a two-tier diagnostic test were administered to evaluate students'…

Scholarly scientific literature conveys epistemological assumptions scientists operate on. Popular scientific literature and instructional science texts deviate in their portrayal of science from these epistemological assumptions. Thus, scholarly scientific literature holds more potential for improving students' epistemological understanding…

Whole-class discussion is a common instructional approach used by secondary science teachers. When orchestrated well, such an approach can provide students with opportunities to engage in extensive science talk with the benefit of teacher guidance and feedback. Our study investigated teachers' approaches to discussion during the piloting of…

Although studies have documented teachers' growth in assessing science resulting from professional development or science methods courses, little attention has been given to growth while being prepared to assess a linguistically diverse student population. In this study, the growth of 11 secondary science preservice teachers is documented by…

Framed in theories of social semiotics, this multiple case study describes and categorizes the actional-operational modes used by three middle school earth science teachers throughout the course of one school year. Data included fieldnotes, photographs, and video recordings of classroom instructions as well as periodic interviews with the…

In response to insufficient participation and female underrepresentation in physics education, this article uses questionnaire data from Norwegian physics students in upper secondary ("N" = 585) and first-year tertiary ("N" = 278) education to characterize the "physics choosers." An expectancy-value perspective is…

In this study, the purpose is to develop and illustrate a method that facilitates investigations of students' learning processes in classroom discussions about socioscientific issues. The method, called transactional argumentation analysis, combines a transactional perspective on meaning making based on John Dewey's pragmatic philosophy…

This study examined how students' science-specific argumentative writing skills and understanding of core ideas changed over the course of a school year as they participated in a series of science laboratories designed using the Argument-Driven Inquiry (ADI) instructional model. The ADI model is a student-centered and writing-intensive…

Although the core work of science is oriented toward constructing, revising, applying, and defending models of the natural world, models appear only rarely in school science, and usually only as illustrations, rather than theory building tools. We describe the rationale and structure for a learning progression to understand the development of…

This study examines students' understanding of the normative connections between key concepts of cell division, including both mitosis and meiosis, and underlying biological principles that are critical for an in-depth understanding of genetic inheritance. Using a structural equation modeling method, we examine middle school students'…

There remains a lack of agreement in the field of science education as to whether student "misconceptions" ought to be considered obstacles or resources, and this has implications for the ways in which prospective teachers think about the value of their students' ideas. This empirical study examines how 14 preservice secondary science teachers in…

This 3-year longitudinal study explores the evolving beliefs of five prospective secondary science teachers in a university preparation program from recruitment through their first year in the classroom. As an interpretive qualitative study, data were collected through semistructured interviews and an array of artifacts. The data sources were used…

Scientific explanation plays a central role in science education reform documents, including the "Benchmarks for Science Literacy," the "National Science Education Standards", and the recent research report, "Taking Science to School." While scientific explanation receives significant emphases in these documents, there is little discussion or…