首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1796篇
  免费   19篇
  国内免费   11篇
教育   1109篇
科学研究   142篇
各国文化   8篇
体育   404篇
综合类   2篇
文化理论   33篇
信息传播   128篇
  2023年   12篇
  2022年   34篇
  2021年   46篇
  2020年   48篇
  2019年   69篇
  2018年   101篇
  2017年   93篇
  2016年   97篇
  2015年   45篇
  2014年   61篇
  2013年   205篇
  2012年   80篇
  2011年   75篇
  2010年   75篇
  2009年   60篇
  2008年   60篇
  2007年   56篇
  2006年   69篇
  2005年   87篇
  2004年   51篇
  2003年   39篇
  2002年   41篇
  2001年   34篇
  2000年   21篇
  1999年   22篇
  1998年   26篇
  1997年   18篇
  1996年   11篇
  1995年   9篇
  1994年   8篇
  1993年   10篇
  1992年   11篇
  1991年   8篇
  1990年   15篇
  1989年   7篇
  1988年   7篇
  1987年   5篇
  1986年   8篇
  1985年   6篇
  1984年   11篇
  1983年   5篇
  1982年   4篇
  1981年   5篇
  1980年   5篇
  1979年   9篇
  1978年   5篇
  1977年   4篇
  1975年   11篇
  1974年   6篇
  1968年   3篇
排序方式: 共有1826条查询结果,搜索用时 31 毫秒
941.
The lack of secondary school students’ motivation in mathematics lessons poses a great challenge. According to the Expectancy-Value Model (Eccles et al., Achievement and achievement motives: psychological and sociological approaches, New York, Freeman, S. 75–146, 1983), teacher and classmates influence students’ value beliefs. Using data of 1868 ninth grade students and their 72 math teachers, this study was designed to assess the association of several indicators of relevance-oriented teaching strategies and of perceived classmates’ math valuing with students’ value beliefs in mathematics. Two-level linear regression analyses provided evidence that the student-rated practical focus of math lessons predicted students’ intrinsic, attainment, utility, and cost value mainly at the individual level; student-rated classmates’ math valuing was associated with students’ value perceptions more strongly at the class level. Over the course of six months, these effects increased at the individual but not at the class level. Teacher-reported effort to establish connections between math and other domains was positively associated with students’ attainment and cost value. Teacher-rated use of daily life examples led to a decrease in students’ cost value over the course of six months.  相似文献   
942.
The introduction of “all-day schools” (i.e. schools that provide extended education times and extracurricular activities) has been a major topic in educational debates in Germany in the last decade. One of the main goals for expanding the provision of all-day schooling in Germany was to support the development of academic skills and abilities of all students independent of their socio-economic-background. Based on empirical results of current studies and the data of the “study of the development of all day schools” educational effects of extracurricular activities are analyzed. Typically studies show that extracurricular participation supports social learning rather than academic achievement. Nonetheless, data provide first hints of compensatory effects. Thus all-day schools can weaken the link between socio-economic background and academic achievement.  相似文献   
943.
In two predictive-learning experiments, we investigated the role of the informational value of contexts for the formation of context-specific extinction learning. The contexts were each composed of two elements from two dimensions, A and B. In Phase 1 of each experiment, participants received acquisition training with a target cue Z in context A1B1 (the numbers assign particular values on the context dimensions). In Phase 2, participants were trained with conditional discriminations between two other cues, X and Y, for which only one of the two context dimensions was relevant. In a third phase, participants received extinction trials with cue Z in context A2B2. During a final test phase, we observed that a partial change of the extinction context disrupted extinction performance when the extinction context was changed on the dimension that had been trained as being relevant for the conditional discrimination. However, when the extinction context was changed on the irrelevant context dimension, extinction performance was not affected. Our results are consistent with the idea that relevant contexts receive more attention than do irrelevant contexts, leading to stronger context-specific processing of information learned in the former than in the latter type of contexts.  相似文献   
944.
This article explores the effect of computerized scaffolding with different scaffolds (structuring vs. problematizing) on intra-group metacognitive interaction. In this study, we investigate 4 types of intra-group social metacognitive activities; namely ignored, accepted, shared and co-constructed metacognitive activities in 18 triads (6 control groups; no scaffolds and 12 experimental groups; 6 structuring scaffolds and 6 problematizing scaffolds). We found that groups receiving scaffolding showed significantly more intra-group interactions in which the group members co-construct social metacognitive activities. Groups receiving problematizing scaffolds showed significantly less ignored and more co-constructed social metacognitive interaction compared to groups receiving structuring scaffolds. These findings indicate that scaffolding positively influenced the group members’ intra-group social metacognitive interaction. We also found a significant relation between students’ participation in intra-group social metacognitive interaction and students’ metacognitive knowledge. Twelve percent of the variance in students’ metacognitive knowledge was explained by their participation in intra-group shared social metacognitive interaction. Therefore, future research should consider how to design scaffolds that elicit intra-group social metacognitive interaction among group members to enhance the development of students’ metacognitive knowledge.  相似文献   
945.
The purpose of this study was to model the relationship between pre-service chemistry teachers’ epistemological beliefs and their preference to use constructivist-learning environment in their future class. The sample was 125 pre-service chemistry teachers from five universities in Turkey. Two instruments were used in this study. One of the instruments was constructivist-learning environment scale developed by Taylor, Fraser and Fisher. The other instrument was Epistemological Questionnaire (EQ) developed by Schommer. In order to analyse data, Structural Equation Modelling was conducted by using LISREL 8.7. The results provided evidence for the good fit of the hypothesised model. Pre-service chemistry teachers’ epistemological belief scores were found to be correlated to their constructivist-learning environment scale scores with the value of .35. This study revealed that pre-service chemistry teachers with sophisticated epistemological beliefs favoured constructivist-learning environment in their future class.  相似文献   
946.
It is argued that knowledge about models is an important part of a profound understanding of Nature of Science. Consequently, researchers have developed different ‘levels of understanding’ to analyse students’, teachers’, or experts’ comprehension of this topic. In some approaches, global levels of understanding have been developed which mirror the idea of an understanding of models and modelling as a whole. Opposed to this, some authors have developed levels of understanding for distinct aspects concerning models and modelling in science (i.e. aspect-dependent levels). This points to an important issue for science education research since global conceptualisations might lead to less differentiated assessments and interventions than aspect-dependent ones. To contribute to this issue, the article summarises conceptualisations of both global and aspect-dependent levels of understanding models and modelling that have been developed in science education. Further, students’ understanding of the aspects nature of models, multiple models, purpose of models, testing models, and changing models has been assessed (N?=?1,180; 11 to 19 years old; secondary schools; Berlin, Germany). It is discussed to what extent the data support the notion of global or aspect-dependent levels of understanding models and modelling in science. The results suggest that students seem to have a complex and at least partly inconsistent pattern of understanding models. Furthermore, students with high nonverbal intelligence and good marks seem to have a comparatively more consistent and more elaborated understanding of models and modelling than weaker students. Recommendations for assessment in science education research and teaching practice are made.  相似文献   
947.
This is among the first longitudinal studies to report student attitudes across 4 yr of a university program. We found that the attitudes of students in biology become significantly more expert-like from the first year to the fourth year of the program, that is, there was a significant positive shift in students’ overall percent favorable scores from 64.5 to 72%, as opposed to the expert response, which averaged 90%. There was a significant positive shift for the real world connection category (78–85%), the enjoyment (personal interest) category (74–82%), and the conceptual connections/memorization category (66–74%). Moreover, there was a significant correlation between students’ overall percent favorable scores and performance (cumulative grade point average) at the end, but not at the beginning, of the fourth year, with high-performing students having significantly more expert-like attitudes than low-performing students. The correlation between percent favorable score and performance was the strongest for the problem solving: synthesis and application category, in which the highest-performing students finished their fourth year with 90% favorable compared with 35% favorable for the lowest-performing students. A comparison of these results with previously reported results and their implications for teaching are discussed.  相似文献   
948.
Interest in student conception of experimentation inspired the development of a fully validated 14-question inventory on experimental design in biology (BEDCI) by following established best practices in concept inventory (CI) design. This CI can be used to diagnose specific examples of non–expert-like thinking in students and to evaluate the success of teaching strategies that target conceptual changes. We used BEDCI to diagnose non–expert-like student thinking in experimental design at the pre- and posttest stage in five courses (total n = 580 students) at a large research university in western Canada. Calculated difficulty and discrimination metrics indicated that BEDCI questions are able to effectively capture learning changes at the undergraduate level. A high correlation (r = 0.84) between responses by students in similar courses and at the same stage of their academic career, also suggests that the test is reliable. Students showed significant positive learning changes by the posttest stage, but some non–expert-like responses were widespread and persistent. BEDCI is a reliable and valid diagnostic tool that can be used in a variety of life sciences disciplines.  相似文献   
949.
Public service producers are heavily investing in the development and implementation of more efficient new digital channels to engage users in citizen sourcing efforts, such as the reporting of public service-related issues. Nevertheless, user-reporters have continued to favor earlier implemented channels including traditional (e.g., phone, office) and e-government channels (e.g., web, email) over new digital channels such as m-government channels (e.g., mobile applications). Drawing on channel choice literature and theories, this study aims at explaining users' reporting behavior by examining the role of users' personal factors, including digital divide determinants, users' service experience, and channel satisfaction. We use a combination of survey and log data on actual reporting behavior among smart bike-sharing users to explain users' channel choice. Using a multinomial logistic regression, we found that the digital divide predicts user-reporters' channel choice. Moreover, user-reporters with a longer service membership favor traditional and e-government channels, over the newly implemented m-government channels. Finally, user-reporters' satisfaction with the mobile application is negatively associated with the user-reporters' choice of traditional and e-government channels. Our results expand and update the empirical evidence on channel choice at the user level, and provide insights for public service producers who aim at enhancing public service delivery through digital users' engagement.  相似文献   
950.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号