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The purpose of this study is to examine the social and self-perceptions of twice-exceptional students, those students who meet criteria for being identified as both gifted and learning disabled. In particular, we focus on how twice-exceptional students are similar to, or different from, students with only a learning disability or who are only identified as gifted. Using data collected from the National Longitudinal Study of Adolescent Health, we identified a group of 90 twice-exceptional adolescents as well as three matched comparison groups. Overall, twice-exceptional adolescents had less positive perceptions of maternal relationships and self-concept than did gifted or nonidentified adolescents. Further, perceptions of maternal relationships mediated and moderated group differences in self-concept. Implications for adults working with twice-exceptional adolescents are discussed.  相似文献   
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ABSTRACT

This article suggests that there are important connections between design and technology and mathematics curricula and that these are not fully made in the United Kingdom National Curriculum. Using three examples, the authors show how there are real opportunities in design and technology teaching for incorporating mathematical learning, but that all too often these are lost because they are not made explicit. Again, the authors argue that too much mathematics teaching is dominated by abstract investigation rather than practical problem‐solving. They conclude by suggesting that teaching should transcend subject boundaries and be concerned with real‐life situations.  相似文献   
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ABSTRACT

We study the developmental and professional activities engaged in by 86 female adult soccer players from the senior national teams of Australia, Canada, England, Sweden, and the United States of America. Players completed the Participation History Questionnaire (PHQ) to elicit the amount and type of activities engaged in across their developmental and professional years, including milestones, soccer-specific activity and engagement in other sport activity. Greater specialisation than diversification characterised their childhood developmental activities, including all players starting in soccer in childhood and accumulating more hours in soccer activity than other sports during this period. However, interindividual variation further characterised these childhood activities, with a proportion of players diversifying into other sports and/or soccer play to a greater or lesser degree during childhood when compared to the other players. The amount of coach-led soccer practice increased for all players across their development culminating in an average of 15–16 h/wk across a 40-week season in early adulthood. In contrast, the amount of engagement in other sports and soccer peer-led play varied between players but generally decreased across adolescence to negligible amounts in late adolescence. Findings are commensurate with the deliberate practice framework and early engagement.  相似文献   
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Reading comprehension is influenced by sources of variance associated with the reader and the task. To gain insight into the complex interplay of multiple sources of influence, we employed crossed random‐effects item response models. These models allowed us to simultaneously examine the degree to which variables related to the type of passage and student characteristics influenced students’ (n = 94; mean age = 11.97 years) performance on two indicators of reading comprehension: different types of comprehension questions and passage fluency. We found that variables related to word recognition, language, and executive function were influential across various types of passages and comprehension questions and also predicted a reader's passage fluency. Further, an exploratory analysis of two‐way interaction effects was conducted. Results suggest that understanding the relative influence of passage, question, and student variables has implications for identifying struggling readers and designing interventions to address their individual needs.  相似文献   
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This article is an argument about something that is both important and severely underemphasized in most current science curricula. The empirical attitude, fundamental to science since Galileo, is a habit of mind that motivates an active search for feedback on our ideas from the material world. Although more simple views of science manifest the empirical attitude through relation of theories to data, we describe more recent philosophical scholarship that characterizes the relation of theories to data through phenomena (regularities in nature’s behavior that can be identified and characterized through data). This view highlights the centrality of material practice, in which scientists design data collection events to inform phenomena. Thus manifestation of the empirical attitude in science is characterized as a design endeavor that involves considerably sophisticated coordination among theories, phenomena, data, and data collection events. If we want students to learn how to participate in such work, curricula should break down these complex processes into more basic components at least at the outset. Our recommendation is to begin with design activities that can focus on the empirical attitude initially without the complex coordination with phenomena and data. We present an example of such an activity and share results that suggest design activities can target the empirical attitude and be built upon in curricula to gradually include coordination with phenomena and theories.  相似文献   
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Assessing the British Library's contribution to the national economy is a complex matter, requiring consideration of a number of different dimensions. First, the value added by the Library takes many forms—economic, cultural, social and intellectual. Second, the British Library adds value both to those who use our products and services directly, and to the wider UK population who benefit indirectly from the Library's existence and the services it provides. Traditionally, attempts to assess these benefits have taken the form of qualitative case studies—telling good stories, but failing to provide a comprehensive evaluation. But now a technique supported by the Nobel Prize winning economists, Kenneth Arrow and Robert Solow, permits a coherent quantitative evaluation of the total benefit to the nation of publicly funded institutions and programmes. Recognising the value of this technique, the British Library commissioned a groundbreaking research study to estimate the impact of the Library on the UK economy. The study demonstrates that the Library generates value of around 4.4 times the level of its annual public funding of £83m. To the best of our knowledge, this study represents the first time the ‘Contingent Valuation’ technique has been used to derive a figure for the overall economic impact of a national or major research library.  相似文献   
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