托尼的美国梦

他来自意大利一个石场,在罗马南边的某个地方。他何时、如何到美国的,我不得而知。但一天晚上,我看见他正站在我家车库后面的车道上,大约五英尺七英寸或者八英寸高,瘦瘦的。     

Methodological considerations for studying science-in-the-making in educational settings

In this paper we explore the methodological implications of sociocultural approaches for the study of scientific knowledge and practices. Research in science studies and science education is reviewed with a focus on methodological considerations. Informed by empirically-based studies of scientific practices from multiple disciplinary perspectives, we describe our perspective for investigating science education which combines ethnography and discourse analysis. This theoretical position on the discursive nature of the social construction of school science-in-the-making forms the basis for theoretical and methodological critique and discussion. We provide a review of the history of nature of science (NOS) research to trace the methodological influence of Science and Technology Studies in science education. Four methodological issues associated with studying science as cultural practices are discussed: the local and contingent nature of situated definitions of science; theory dependence and coherence of research methodologies; attention to the study of school science-in-the-making; and reflexivity.     

Evaluating the impact of library services on the quality and cost of medical care

Recent federal regulations have minimized the role of the hospital library in contributing to the quality of medical care and in lowering hospital costs. We trace the events that have led to these assumptions and discuss the complex problem of evaluating the impact of library services. Current research on the value and effectiveness of information is outlined.     

The IQs of children with ADHD are normally distributed

The purpose of this investigation was to determine whether or not attention-deficit/hyperactivity disorder (ADHD)-when there was an absence of reading problems-was associated with having a high IQ. The vocabulary and block design short forms of the Wechsler Intelligence Scale for Children-Third Edition were administered to 63 children with ADHD, 69 children with reading difficulties (RD), and 68 children with comorbid ADHD + RD. Results indicated that the distributions of estimated Full Scale IQs (FSIQ) for each of the three groups of children did not differ significantly from a normal distribution, with the majority of children (more than 50%) in each group scoring in the average range. The percentage of children with ADHD who scored in the above-average range for FSIQ was not significantly higher than the percentages of children in the other two groups. No significant group differences emerged for estimated FSIQ, vocabulary, or block design. It was concluded that children with ADHD are no more likely to have an above-average IQ than are other children.     

What counts as knowing: Constructing a communicative repertoire for student demonstration of knowledge in science

The purpose of this study was twofold. One purpose was to identify the locally negotiated literate practices that defined ways of communicating information and knowledge across the curriculum in a fourth/fifth grade classroom. Through an ethnographic and sociolinguistic set of analyses, this investigation illustrated how the teacher worked to construct a learning environment that valued the use of multiple discourses as a way of communicating competence as a learner. Another purpose was specifically to address the ways that these practices contributed to student demonstration of knowledge in science. This was accomplished by an analysis of one student's presentation of science knowledge after a study of simple machines. A comparative analysis between his use of two discourses, written and oral, showed that the opportunity to choose between multiple discourses led to his success in demonstrating competence in ways that may have otherwise remained questionable. © 2004 Wiley Periodicals, Inc. J Res Sci Teach 42: 139–165, 2005     

Teaching with student response systems in elementary and secondary education settings: A survey study

This study examined how 498 elementary and secondary educators use student response systems in their instruction. The teachers all completed an online questionnaire designed to learn about their goals for using response systems, the instructional strategies they employ when using the system, and the perceived effects of response systems. Participants in the study tended to use similar instructional strategies when using the technology as have been reported in higher education. These include posing questions to check for student understanding and diagnose student difficulties, sharing a display of student responses for all to see, asking students to discuss or rethink answers, and using feedback from responses to adjust instruction. A latent class analysis of the data yielded four profiles of teacher use based on frequency of use and breadth of instructional strategies employed. Teachers who used the technology most frequently and who employed broadest array of strategies were more likely to have received professional development in instructional strategies and to perceive the technology as more effective with students.