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。     

Spanish-Speaking Children's Social and Language Development in Pre-Kindergarten Classrooms

The current study examined the social and language development of 345 Spanish-speaking pre-kindergartners who attended pre-kindergarten programs that varied widely in how much Spanish was spoken in the classroom by the teacher. Previous studies on English language learners have focused on how the language of instruction impacts children's language proficiency, ignoring the context in which children are learning. The current study found better social skills and closer teacher—child relationships in classrooms where teachers spoke some Spanish. Teacher ratings of children's peer social skills and assertiveness were positively associated with increased amounts of Spanish being spoken. More Spanish language use in the classroom was also related to a decrease in children's likelihood of being victims of aggression as rated by independent observers. The findings have implications for better understanding how policy decisions regarding language of instruction impact children in the social domain. As early education programs are faced with the challenging task of developing best practices for English language learners, it is essential that programs are attentive to the social implications of language.     

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.     

Teaching and Learning IT in Secondary Schools: Towards a New Pedagogy?

New Technologies, particularly Information and Communications Technologies (ICTs), have caused profound changes throughout society. A generation of children is emerging already immersed in a multimedia 'data storm' (Moshell, 1995). Their understandings and expectations of the world are mediated through their experiences of multimedia and ICTs and these differ from those of preceding generations nourished on linear technologies. Educating these children using models of teaching and learning that are grounded in concepts of knowing and understanding that are linear and finite will not help them succeed in a technological, global future where multi-disciplinary, holistic approaches predominate. The conflict between the traditional and the new in English secondary schools is particularly intense in the teaching and learning of Information Technology (IT). Teaching and learning IT are inherently constructivist activities, and IT teachers who attempt to implement learning programmes designed from predominantly behaviourist perspectives quickly find that these are less effective. A new pedagogy is needed that is theoretically sound, that goes beyond a cookbook approach, and that guides teachers in using constructivist approaches within an education system grounded in an inimical behaviourist paradigm. This paper takes some tentative steps in this direction. © 1999 IFIP, published by Kluwer Academic Publishers     

Supporting prospective teachers' conceptions of modelling in science

This study investigated prospective secondary science teachers' understandings of and intentions to teach about scientific modelling in the context of a model‐based instructional module. Qualitative methods were used to explore the influence of instruction using dynamic computer modelling. Participants included 14 secondary science prospective teachers in the USA. Research questions included: (1) What do prospective teachers understand about models and modelling in science? (2) How do their understandings change, following building and testing dynamic computer models? and (3) What are prospective teachers' intentions to teach about scientific models? Scaffolds in the software, Model‐IT, enabled participants to easily build dynamic models. Findings related to the process, content, and epistemological aspects of modelling, including: (a) prospective teachers became more articulate with the language of modelling; and (b) the module enabled prospective teachers to think critically about aspects of modelling. Still, teachers did not appear to achieve full understanding of scientific modelling.     

When and why do initially high-achieving poor children fall behind?

In this paper, we examine the trajectories of initially higher- and lower-achieving children from lower and higher socio-economic status families from primary school through to university in England for the first time. We also explore what explains these trajectories. This enables us to provide new insights into when and why the performance of children with similar initial achievement diverges on the basis of their socio-economic background. Our results indicate that pupils from poor backgrounds who are higher achievers in primary school fall behind their better-off but lower-achieving peers during secondary school. This suggests that secondary school may be a critical period to intervene to prevent poor children from falling behind their richer peers. Our analysis suggests that there is less divergence in performance between pupils from different socio-economic backgrounds who attend the same schools. This result is particularly strong for children with low initial achievement. While we remain cautious about the implications of these findings, they provide suggestive evidence that schools (or the sorting of pupils into schools) play an important role in explaining why the test scores of richer and poorer children diverge over time.     

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.