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   3932篇
  免费   66篇
  国内免费   24篇
教育   3179篇
科学研究   316篇
各国文化   4篇
体育   238篇
综合类   158篇
信息传播   127篇
  2024年   1篇
  2023年   34篇
  2022年   35篇
  2021年   77篇
  2020年   116篇
  2019年   90篇
  2018年   94篇
  2017年   109篇
  2016年   101篇
  2015年   89篇
  2014年   193篇
  2013年   396篇
  2012年   305篇
  2011年   297篇
  2010年   219篇
  2009年   199篇
  2008年   238篇
  2007年   279篇
  2006年   236篇
  2005年   219篇
  2004年   176篇
  2003年   151篇
  2002年   138篇
  2001年   97篇
  2000年   54篇
  1999年   15篇
  1998年   10篇
  1997年   14篇
  1996年   11篇
  1995年   6篇
  1994年   4篇
  1993年   2篇
  1992年   6篇
  1991年   2篇
  1990年   1篇
  1989年   1篇
  1978年   2篇
  1977年   2篇
  1976年   3篇
排序方式: 共有4022条查询结果,搜索用时 35 毫秒
1.
Abstract

BIBCO is one of four programs in the PCC. This article summarizes the development of BIBCO and how its cataloging training program was strikingly different from the other three programs: NACO, CONSER and SACO. BIBCO grew out of the 1990–1991 recession which created widespread anxiety over the cost of original cataloging. BIBCO attempted to reduce the cost without sacrificing quality and increase record production through the use of core records. The early training emphasized the value of cooperation. PCC’s strength in this area is seen today in its partnerships and leadership in metadata initiatives such as linked data.  相似文献   
2.
BackgroundHealth-related fitness knowledge (HRFK) has been an essential concept for many health and physical education programs. There has been limited understanding and longitudinal investigation on HRFK growth. This longitudinal study examined HRFK growth and its individual- and school-level correlates in middle school years under 1 curriculum condition: Five for Life.MethodsParticipants were 12,044 students from 47 middle schools. Data were collected at both individual/participant and school/institution levels. Individual-level variables included gender, grade, and HRFK test scores. School-level variables included percentage of students receiving free and reduced meals (FARM), student-to-faculty ratio for physical education, and school academic performance (SAP). We used hierarchical linear modeling to examine HRFK 3-year growth in relation to individual- and school-level correlates.ResultsThe average HRFK score at 6th grade for females was 42.81% ± 1.32%. The predicted HRFK growth was 17.06% ± 1.02% per year, holding other factors constant. A 1-standard deviation increase in FARM correlated with a 14.68%-point decrease in predicted test score (p = 0.02). A 1-standard deviation increase in SAP was associated with an 11.90%-point increase in HRFK score. Males had a significantly lower growth rate than females during the middle school years (0.78%/year, p = 0.02).ConclusionThe result showed that both individual- and school-level variables such as gender, FARM, and SAP influenced HRFK growth. Educators should heed gender differences in growth curves and recognize the correlates of school-level variables.  相似文献   
3.
党的十九届四中全会明确提出了“坚持和完善中国特色社会主义制度、推进国家治理体系和治理能力现代化的重大意义和总体要求”。在新的历史时期,我国体育智库的新使命在于推进体育强国、健康中国和体育治理现代化建设。基于此,采用文献资料法和逻辑分析法,从外部和内部两个角度,对我国体育智库的责任和担当进行深入探讨。认为体育智库对内要注重更新管理体制,完善运行机制,建设和优化人才培养体系;对外要通过科研成果转化实现体育产业高质量发展,重塑体育治理生态,提升国家体育文化软实力和国际体育地位硬实力,促进体育融合发展,最终服务于我国体育治理体系和治理能力现代化。  相似文献   
4.
The purpose of the present study was to examine the role of perfectionism in the second/foreign language (L2) learning context. To this end, we investigated the possible links between perfectionism, emotions, achievement goals, and L2 achievement. A total number of 2008 secondary school students completed the relevant questionnaires. First, confirmatory factor analysis was performed to assure the construct validity of the questionnaires. Then, separate structural equation models were conducted to examine the relations among variables. Results indicated that adaptive perfectionism was directly related to positive emotions, while the opposite pattern was found for maladaptive perfectionism. Moreover, only adaptive perfectionism was related to mastery goals, and both adaptive and maladaptive perfectionisms were related to performance-approach goals and performance-avoidance goals. Maladaptive perfectionism dimensions were negatively related to L2 achievement, while one dimension of adaptive perfectionism had positive relation and another one had negative relation with L2 achievement. Finally, mediation analysis was performed and results showed that only negative emotions and only mastery goals could mediate the relation between perfectionism dimensions and L2 achievement.  相似文献   
5.
新中国成立初期体育学界的探索和体育事业的发展,为当代体育哲学社会科学发展提供了重要的经验启示和思想资源。出于复杂原因,当时被"双百"方针孕育而生的首次体育学术论争,鲜有人提及。在学界内外争鸣氛围的激励下,这次论争系统总结了当时体育发展中的基本问题,空前活跃了体育研究氛围,也促使篮球战术、体育内行与外行、武术渊源和发展等具体问题的讨论得以深入展开;而历史条件的特殊性和局限性,致使其偏离了体育场域且未能充分关注基本国情;从研究者的态度、论争者的遗憾和体育界的反思等层面,对我国首次体育学术论争及其深远影响进行研判。  相似文献   
6.
The low pass rate in Brunei Year 13 mathematics is a source of concern for many stakeholders. Success in mathematics is required for students wishing to attend university and pursue courses in the sciences and technology. Many different factors contribute to success and failure in mathematics. This field survey (N = 330 randomly selected Year 13 students representing 179 females and 151 males) determined the extent to which coping mechanisms, study strategies, learning styles, and self-efficacy were related to academic achievement in mathematics. Stepwise multiple regression analysis with backward elimination identified six statistically significant main effect variables with links to mathematics achievement (task-oriented coping, textbook reading, concentration, self-efficacy, time management, and activist learning style). Two-way interactions of the male and female genders with deep processing and reflector learning styles were also significantly associated with mathematics achievement. Other significant interaction variables were beneficial to both genders.  相似文献   
7.
We analyse the effect of violent crime on students' results in Costa Rica. The combination of PISA data and highly disaggregated information on crime at the district level is a main contribution of this article. Our methodological approach provides also some novelties in the field, the most important being the use of a simultaneous equations model solved with instrumental variables. This allows us to obtain unbiased and efficient estimators in the presence of simultaneity between education and crime. We conclude that exposure to crime, measured by the homicide rate, has a negative and significant impact on academic achievement. This effect is particularly important in the case of students attending schools situated in districts with a lower social development.  相似文献   
8.
ABSTRACT

Within the context of Pintrich’s self-regulated learning model, recent reviews of the literature show that motivational factors are the strongest predictors of academic performance. Even so, gaps remain in terms of which goal orientation constructs area most strongly related to performance, and whether academic self-efficacy is involved in such relationships, either as mediator or moderator. This study addresses these gaps using a sample of 478 university students; 409 females aged 17–62 (M?=?23.28, SD?=?7.22) and 69 males, aged 18–47 (M?=?22.5, SD?=?6.31). Analyses revealed that academic self-efficacy (ASE) mediated relationships between both mastery and performance-approach goal orientation with achievement, though the mediation effect was larger for the relationship involving mastery approach goal orientation. ASE did not moderate the relationship between performance-approach goal orientation and achievement. Findings suggest teaching programmes should foster learning environments that encourage persistence and effort when learning, and consider how course delivery and feedback can enhance academic self-efficacy, regardless of the goal orientation adopted by students.  相似文献   
9.
Grit has been defined as passionate perseverance toward long-term challenging goals and it is associated with various positive outcomes for youth, including academic achievement. However, less is known about these associations for the two facets of grit (i.e., perseverance of effort, consistency of interest) and few studies have examined the link between grit and perceived social support. The present study examined the group-level demographic differences (i.e., gender, grade, socioeconomic status, and special education status) of grit in a high school sample (N = 1,077). In addition, direct associations between grit and perceived social support from multiple sources (i.e., teacher, classmate, parent) were examined, as well as a potential enhancing effect of social support as a moderator of the relation between grit and academic achievement. Results indicated positive associations among grit and its facets with social support from parents and classmates. Furthermore, the positive relation between grit and achievement was stronger for students reporting high social support from teachers, but not other sources (i.e., classmates, parents). Practical and theoretical implications for promoting student success are discussed.  相似文献   
10.
This article reports a 3-year case study of a primary school in England, in which a recently appointed principal attempted to build ‘collegial professional autonomy’ (Nordic Journal of Studies in Educational Policy, 2 , 2015, 20) within a push to improve students’ progress and attainment. The research examined the tensions between staff who embraced the principal's agenda for collegially agreed change, and whose students’ academic progress and performance improved over a 3-year consecutive period when measured in terms of students’ entry-level attainment and socio-economic factors, and staff who asserted their right to ‘individual professional autonomy’ and whose students’ academic progress and attainment declined. The research: (i) challenges claims that reform necessarily results in school cultures of compliancy, de-professionalisation and the technicisation of teaching; (ii) raises issues concerning the pedagogical leadership of principals in a devolved, ‘self-governing’ school system; and (iii) questions teachers’ entitlements to individual professional autonomy where this is associated with students’ continuing academic underperformance.  相似文献   
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