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TACTICS (French and Spanish acronym standing for Collaborative Work and Learning in Science with Information and Communications Technologies) is an ongoing project aimed at investigating a distributed community of learning and practice in which information and communications technologies (ICT) take the role of collaborative tools to support social construction of knowledge. This community is composed of researchers, graduate students, and high-school teachers and their students, from six schools and four universities in Canada and Mexico. It set out in fall 2000 to develop a community around the general topic of integrating concepts in science school subjects. Once a prototype community is established, it can become a terrain where different aspects could be studied. Subsequently, researchers could gradually take a back seat allowing as well as ensuring the autonomy of the school members involved and, thereby, the viability of the learning community. The set up of the proposed prototype distributed science learning community was therefore an essential yet far from trivial first step. This paper discusses the process of setting up the community and the lessons learned.  相似文献   
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Abstract

The aim of the study was to compare the effect of a Sport Education-based irregular teaching unit on the high-school students’ physical activity (PA) during school recess. A sample of 91 adolescents (45 girls) aged 13–16?years old met the exclusion criteria. The six classes were cluster-randomly assigned to the Irregular Sport Education group (Sport Education methodology with competitions in recess), Traditional Sport Education group (Sport Education methodology with competitions in Physical Education lessons), or to the control group (non-intervention). The students’ PA during school recess periods were objectively assessed by GT3X accelerometers. The results of the repeated-measures nested analysis of variance showed that the Sport Education-based irregular teaching unit significantly improved the students’ PA during recesses (p?<?0.001). The competitions phase of the Sport Education model performed at school recesses seems to be a valuable strategy for increasing students’ PA contributing to the achievement of the daily recommendations.  相似文献   
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For the consolidation of entrepreneurial education as a field of research, a number of challenges must be met, among them, a better connection between pedagogical objectives and the design of programmes, as well as greater methodological rigour in the evaluation of their impact. With this in mind, this paper analyses the results of an entrepreneurial education programme carried out with a group of students from a Spanish university, contrasting the results with a control group. The results indicate that, after this process, the participating students displayed greater entrepreneurial potential than the group of students that had not participated. However, this difference is due more to a loss of entrepreneurial intention in the group not participating in the programme than to an improvement in the participating students.  相似文献   
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Privatization in higher education is usually understood either as the surge of private institutions or as universities’ growing reliance on private sources of funding or otherwise operating more like firms. Joining the growing literature on university entrepreneurship, this is a case study on the less examined problem of entrepreneurial universities in developing countries. In a period of roughly 15 years, the Pontificia Universidad Católica of Chile, founded in 1888, turned itself from a mostly teaching institution to a research-oriented university, responsible for one-fourth of the Chile’s mainstream scientific output and 40% of all Ph.D.s awarded nationally. Yet, public funding represents today only 17% of its revenues, down from almost 90% in 1972. How such academic development could have occurred as the State withdrew and the market took hold of Chilean higher education after the reforms introduced by the military rule of Augusto Pinochet (1973–1990) is the theme of this work. Universidad Católica’s policies and strategies are described, and the factors contributing to its success, together with their limitations, identified. The case suggests that orientation to the market can be more a means for survival and growth under the pressure of privatization, than a result of a ‘Triple Helix’ strategy of universities, government and industry to generate innovation out of academic knowledge. Secondly, while in the industrialized world, higher education entrepreneurship is associated with knowledge production for economic development (‘Mode 2’), entrepreneurial universities in the context of developing countries may just be finding their way to the academic, disciplinary mode of research.  相似文献   
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从节点导纳矩阵出发 ,定义了电压图、电流图 ,把节点导纳矩阵的代数余子式表示为电压图、电流图中完全树的树支导纳乘积之和  相似文献   
139.
This article deals with the solving of rotation problems, and shows that there is an alternative to using mental rotations or their encoding into verbal terms: namely using geometrical properties. The idea is consistent with the theory which distinguishes between visual and analytical individuals, but uses the construct strategies instead of the construct preferred processing mode. Moreover, contrary to many researchers who refer to this distinction, but who often use it to classify students, this researcher introduces a new parameter, namely the nature of the task. The article presents the analysis of the functionality and effectiveness of the different kind of strategies as a function of the task's characteristics. The research, dealing not with individual traits but with solving strategies, offers information that could be helpful for the improvement of geometry teaching.  相似文献   
140.
Most children attend kindergarten very early in western societies; in fact, they are inserted in different contexts of socialization (family, school and/or other day-care). In what are these contexts of socialization different for linguistic abilities that they contribute to develop? How can the young children adapt themselves to these differences? These questions are discussed considering theoretical interactionnist approaches, and some analyses of communication practices in french kindergarten. Perspectives are released for a discussion on a pedagogy of oral language with young children.  相似文献   
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