This review, written to celebrate the 25th anniversary of the International Journal of Science Education, revealed a period of changes in the theoretical views of the language arts, the perceived roles of language in science education, and the research approaches used to investigate oral and written language in science, science teaching, and learning. The early years were dominated by behavioralist and logico-mathematical interpretations of human learning and by reductionist research approaches, while the later years reflected an applied cognitive science and constructivist interpretations of learning and a wider array of research approaches that recognizes the holistic nature of teaching and learning. The early years focus on coding oral language into categories reflecting source of speech, functional purpose, level of question and response, reading research focused on the readability of textbooks using formulae and the reader's decoding skills, and writing research was not well documented since the advocates for writing in service of learning were grass roots practitioners and many science teachers were using writing as an evaluation technique. The advent of applied cognitive science and the constructivist perspectives ushered in interactive-constructive models of discourse, reading and writing that more clearly revealed the role of language in science and in science teaching and learning. A review of recent research revealed that the quantity and quality of oral interactions were low and unfocused in science classrooms; reading has expanded to consider comprehension strategies, metacognition, sources other than textbooks, and the design of inquiry environments for classrooms; and writing-to-learn science has focused on sequential writing tasks requiring transformation of ideas to enhance science learning. Several promising trends and future research directions flow from the synthesis of this 25-year period of examining the literacy component of science literacy -among them are critical listening and reading of various sources, multi-media presentations and representations, effective debate and argument, quality explanation and the role of information and communication technologies/environments.

Progress has been made in developing statistical methods for identifying DIF items, but procedures to aid with the substantive interpretations of these items have lagged behind. To overcome this problem, Roussos and Stout (1996) proposed a multidimensionality‐based DIF analysis paradigm. We illustrate and evaluate an application of this framework as it applied to the study of gender differences in mathematics. Four characteristics distinguish this study from previous research: the substantive analysis was guided by past research on the content and cognitive‐related sources of gender differences in mathematics achievement, as presented in the taxonomy by Gallagher, De Lisi, Holst, McGillicuddy‐De Lisi, Morely, and Cahalan (2000); the substantive analysis was conducted by reviewers who were highly knowledgeable about the cognitive strategies students use to solve math problems; three statistical methods were used to test hypotheses about gender differences, including SIBTEST, DIMTEST, and multiple linear regression; and the data were from a curriculum‐based achievement test developed with the goal of minimizing obvious, content‐related gender differences. We show that the framework can lead to clearly interpretable results and we highlight both the strengths and weaknesses of applying the Roussos and Stout framework to the study of group differences.

Lifelong science literacy begins with attitudes and interests established early in childhood. The use of trade books (i.e., a literary work intended for sale to the general public) in North American school classrooms to support the development of science literacy invites an examination of the quality of science content disseminated to students. A total of 116 trade books were examined to: (a) determine the degree to which science trade books complement expected science knowledge outcomes outlined in school curricula, and (b) compare trade book content to the goals of scientific literacy. Analysis across four science topics, Dinosaurs, Space, Inheritance, and Growth and Life Properties, revealed that this body of children's literature is inconsistent in its coverage of curricular goals and elements of scientific literacy. Because trade books represent children's first exposure to science, these shortcomings should be addressed if these books are to be maximally effective in promoting science literacy. Implications for using trade books in the classroom are discussed.

Skill in reading diverse genres of scientific texts, including media reports, is an important aspect of scientific literacy that some experts argue should be included in the science curriculum. To understand current and potential uses of media reports in classrooms, we conducted research in three areas. First, we examined major science education policy documents and found few statements making direct reference to use of media reports. Second, we analyzed provincial assessment materials and found exam items using media reports. Third, we interviewed secondary teachers to determine their practice and views on using media reports and other science genres in instruction. Teachers used media reports and strongly endorsed policy‐type statements advocating the use of diverse science genres including these reports. Clearly, policy lags behind practice in some classrooms. © 2006 Wiley Periodicals, Inc. Sci Ed 90:496–521, 2006

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