Adult-child interaction in children’s learning from “Sesame Street”

This study examined whether children’s learning from “Sesame Street” could be improved by having adults ask the children questions and provide them with feedback while they watched the show. Subjects were 23 three- and four-year-old, white, middle-class children who were randomly assigned to one of two conditions. Children in both conditions watched three specially edited versions of “Sesame Street” with an adult. While they did so, children in the experimental condition were asked to name the letters and numbers shown on the programs. Results indicated that 3 days after watching the last program, children in the experimental condition were better able to name and identify the letters and numbers they had seen (p < .01). Three features of the experimental treatment that may have contributed to these results are discussed, as are the implications of the findings.     

Notes on Classroom Practice and the Ownership and Use of Personal Computers Amongst Egyptian Science and Mathematics Teachers

This paper reports a study of the acquisition and use of personal computers by Egyptian science and mathematics teachers. Self-report data was collected from the same teachers on how they had changed their classroom activities and professional practice since their return to Egypt following a twelve-week in-service course in the United Kingdom. The data from this sample of teachers is compared with that from a second sample, who also attended the same in-service programme, but did not report the purchase of a personal computer. Analysis indicates that the Egyptian teachers with personal computers have tended to concentrate on improving the quality of current practice, through better preparation and student testing, rather than introducing major, paradigmatic, changes to their teaching.     

Preparing preservice teachers to use computers effectively in elementary schools

Abstract

Computers and computer software have become integral components of the elementary school curriculum. Classroom teachers often express concern about the inadequate training they receive in the use of technology in the classroom. To meet the needs of future teachers, three university professors added issues related to using technology with young children to existing courses for elementary education majors. In addition, they introduced criteria for evaluating software and gave students opportunities to select software for instruction. After completing the courses, students were more comfortable with using computers, felt more competent about reviewing software, and were more aware of the issues related to using technology for instruction.     

Learning objects and the e-learning cost dilemma

The creation of quality e-learning material creates a cost dilemma for many institutions, since it has both high variable and high fixed costs. This cost dilemma means that economies of scale are difficult to achieve, which may result in a consequent reduction in the quality of the learning material. Based on the experience of creating a masters level course at the UK Open University, the article suggests that the adoption of learning objects represents one possible resolution to this dilemma. They achieve this through the reduction of the fixed costs by four means: reuse, rapid production, ease of updating and cost-effective pedagogy.     

For-profit schools in England: the state of a nation

Abstract

Trends towards the marketisation of the schooling sector have led to suggestions that state-funded schools in England will soon be allowed to operate on a for-profit basis. This article has two aims: to contribute to understanding of the regulation and characterisation of existing for-profit schools in England; and to assess the claim that for-profit schools ‘significantly outperform’ all independent schools by exploring the use of large scale databases including the National Pupil Database (NPD). This study highlights the growth of the for-profit sector, and the scarcity of legislation detailing the financial governance, educational oversight and staffing requirements of schools in the for-profit schooling sector. The for-profit schooling sector is found to be underperforming in terms of school inspection ratings at a level of statistical significance in comparison to the state funded schooling sector. Furthermore, performance indicators relating to GCSE and A level results suggest that the for-profit sector is underperforming compared to the not-for-profit independent sector. As such, the findings of this research have implications in undermining the neoliberal argument that has driven significant change in the schooling landscape in recent times.     

Cold comfort in the primary school

This paper contributes to the debate about conceptualising policy research by considering Howell's (1990) call that researchers reveal the ‘principle of choice’ which guides the selection of topics, strategies and resources in research. Specifically, it addresses the question of what information must be made available to other researchers so that there can be productive continuing conversations’ (Ball 1994:174) about policy research and its conceptualisation. An examination of the policy sociology literature indicates that the specification of the ‘principle of choice’ requires discussion of the intellectual resources deployed in the research and a consideration of the processes of intellectual work which render these resources meaningful. This specification is then applied in relation to my current research, the ‘Social Organisation of Education Practice’ (soep) project to investigate the changing relationship between education and training in Australia. The products and processes of intellectual work that have constituted the principle of choice in my own research are outlined and justified. The way this principle of choice has shaped the conceptualisation of the soep project is discussed and attention drawn to the practical limits of explicit conceptualisation and justification in research. The paper concludes by affirming the importance of making the principle of choice explicit but queries how this can be done in shorthand.     

Does a formal wiki event contribute to the formation of a network of practice? A social capital perspective on the potential for informal learning

Informal learning in blended and online settings plays an increasingly important role in the continuous professional development of individuals. Yet, how do individuals engage into these types of activities? We argue that social capital theory can provide valuable insights into how people behave and decide to take part in (in)formal learning. Using social network analysis, we provide empirical evidence on an informal learning activity, where participants collaboratively created knowledge on wiki sites on a predefined set of topics. Our results show that there are three types of active participants in these types of informal learning activities, namely leaders, collaborators and lone editors. These findings provide valuable insights for other, similar activities that aim at enhancing the professional development of individuals.     

Gender-specific effects of artificially induced gender beliefs in mental rotation

Men outperform women in the Mental Rotation Test (MRT) by about one standard deviation. The present study replicated a gender belief account [Moè, A., & Pazzaglia, F. (2006). Following the instructions! Effects of gender beliefs in mental rotation. Learning and Individual Differences, 16, 369–377.] for (part of) this effect. A sample of 300 adults, whose gender beliefs about mental rotation were manipulated experimentally (instructions given: men are better, women are better, or no gender differences exist) had to complete the MRT. Artificially induced gender beliefs affected performance and guessing behavior differently in relation to gender. Women's performance followed the gender belief induction but their guessing behavior remained unaffected. Men's performance, however, remained unaffected but their guessing behavior followed the gender belief induction. These findings suggest that gender beliefs affect men and women differently, and they also suggest that a gender belief account cannot (fully) explain gender differences in mental rotation performance.     

汽车干式离合器啮合时的产热和传热（英文）

目的:本研究旨在凸显热效应在离合系统动态摩擦分析中的重要性以及将其拓展到制动系统的可能性。创新点:采用一种未被报道过的新方法从根本上整合摩擦特性、微结构组分、产热机理、摩擦片磨损和传热机制。方法:基于能量守恒原理,针对由飞轮、摩擦片和压力板构成的离合系统提出一种适用于工业应用的热分区网络解析模型。结论:1.通过实测得到的μ-ν特性表明,新的摩擦片具有磨损片子所不具备的温度敏感性。2.通过对磨损片子的微结构分析以及热导率变化的测量显示,晶格结构中铜颗粒损耗会导致其导热性能减弱。3.使用摩擦计的测量结果显示新的摩擦片相对于磨损片子具有更高的摩擦系数;较高的摩擦系数减轻了离合器啮合时产生的界面滑移的程度,从而减小了由于产热导致的摩擦功率损耗。4.根据本文发展的热学模型,新的摩擦片可通过其优良的导热性将摩擦产生的热量释放出去。