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   15044篇
  免费   230篇
  国内免费   12篇
教育   10244篇
科学研究   1327篇
各国文化   162篇
体育   1556篇
综合类   22篇
文化理论   115篇
信息传播   1860篇
  2021年   112篇
  2020年   217篇
  2019年   312篇
  2018年   365篇
  2017年   453篇
  2016年   392篇
  2015年   256篇
  2014年   356篇
  2013年   2996篇
  2012年   288篇
  2011年   330篇
  2010年   254篇
  2009年   293篇
  2008年   289篇
  2007年   269篇
  2006年   247篇
  2005年   230篇
  2004年   474篇
  2003年   360篇
  2002年   387篇
  2001年   250篇
  2000年   261篇
  1999年   213篇
  1998年   108篇
  1997年   133篇
  1996年   158篇
  1995年   146篇
  1994年   133篇
  1993年   135篇
  1992年   179篇
  1991年   189篇
  1990年   172篇
  1989年   218篇
  1988年   184篇
  1987年   216篇
  1986年   163篇
  1985年   212篇
  1984年   180篇
  1983年   156篇
  1982年   150篇
  1981年   115篇
  1980年   102篇
  1979年   164篇
  1978年   130篇
  1977年   111篇
  1976年   132篇
  1975年   100篇
  1974年   117篇
  1973年   88篇
  1971年   100篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
School‐Wide Positive Behaviour Support (SWPBS) is increasingly becoming a popular approach to managing challenging behaviour in schools. However, several issues still have to be addressed facilitate successful implementation of this approach in schools. One of these issues pertains to the appropriateness of the different measures used to determine the efficacy of the approach. Because many schools are using indirect measures to assess the effects of SWPBS implementation, determining which measures more accurately reflect the effectiveness of the SWPBS components may increase the effectiveness of school measurement systems. The purpose of this study was to examine the measures used in evaluating the efficacy of positive behaviour support. The paper discusses the strengths and weaknesses of outcome measures regarding problem behaviour, prosocial behaviour, and implementation fidelity.  相似文献   
992.
Nigeria is one of few countries that reports having translated national policies on school-based comprehensive sexuality education (CSE) into near-nationwide implementation. We analysed data using the World Health Organization-ExpandNet framework, which provides a systematic structure for planning and managing the scaling up of health innovations. We examined how Nigeria's nationwide programme was designed and executed. Since 2002, Nigeria has developed a well thought through strategy to scale up CSE. Crucial attributes that facilitated the scaling up included technical consensus about the innovation and clarity about its components, dissection of a complex intervention into manageable components for implementation by organisations with complementary expertise, strong political leadership and championship in concert with advocacy and technical support from non-governmental organisations, proactive and energetic involvement of community stakeholders, effective programme management, and improvements to the information management system to ensure on-track implementation and mid-course corrections to keep stakeholders, including funders, informed and engaged. Challenges included programmatic values, competing priorities for available human resources and a lack of predictable funding for sustaining a rapid scale-up effort. Despite some weaknesses, implementation has largely proceeded according to plan. The lessons learned from Nigeria's experience can and should be used in other settings to achieve wide-scale coverage.  相似文献   
993.
This study examined the quality of teacher–child interactions and exposure to mathematics instruction as predictors of 5th grade student’s mathematics achievement. The sample was a subset of the children involved in the NICHD–SECC longitudinal study (N = 657). Results indicate that, even after controlling for student demographic characteristics, more exposure to mathematics instruction was related to increased fifth grade mathematics achievement for both calculations and applied problems assessments, but there was no main effect for improved instructional quality. Findings also indicate that, in classrooms where lower instructional quality was observed, greater exposure to mathematics instruction predicted improved mathematics achievement. Findings are discussed in terms of differing aspects of mathematics instruction and the possible compensatory role of exposure to instruction in classrooms of lower quality.  相似文献   
994.
995.
996.
Statewide exit exams have become a central governance instrument at the end of secondary schooling in Germany. In the article, the current state of research in Germany is systematized from an international comparative perspective in relation to intended and unintended effects. Findings regarding state exam policies and effects at the school and instructional level are presented as an interim report on a comparably young field of research. The findings show differences by states, subjects and courses which suggest that there is no general effect of statewide exams. In this context, future research should account for the heterogeneity of exam procedures to a greater degree.  相似文献   
997.
Ubiquitous “sex tips” in popular media evidence an unquenchable public interest in learning how to experience “great sex,” and studies confirm that a great sexual relationship correlates to general relationship satisfaction, which in turn correlates to overall happiness. While studies of great sex or “optimal sexuality” are few, enough is known to conclude that the paths to great sex depicted in popular media are largely dead ends. This lesson plan will help educators (a) dispel inaccurate information about optimal sexuality disseminated in the popular media and (b) inform students about the components of optimal sexuality.  相似文献   
998.
Instructors of sexual health courses in rural areas face unique challenges as they are often forced to use school-based prevention curricula field-tested in urban areas. Research has yet to consider what future sex educators’ regional expectations are for their profession and how those expectations might have an impact on the classroom. Drawing from interviews with 26 sex-educators-in-training, we find that future educators tended to expect that rural communities would be less diverse, more conservative, and less informed about sexual health matters, even though research demonstrates that today's rural communities inconsistently align with those perceptions.  相似文献   
999.
Schools are an important context for both basic and applied scientific research. Unlike the laboratory, however, the physical and social conditions of schools are not under the exclusive control of scientists. In this article, we liken collecting data in schools to putting on a theatrical production. We begin by describing the large cast of characters whose collaborative efforts make school‐based research possible. Next, we address the critics, including the university Institutional Review Board (IRB) and school administrators, whose feedback often improves the final study design. We then turn our attention to set building, stage directions, and rehearsals—key steps in the iterative process of refining study procedures. We end with a discussion of the day of data collection itself and activities that take place after the curtain drops. Throughout, we make recommendations based on our recent experience collecting data at several high schools.  相似文献   
1000.
Despite the impact of genetics on daily life, biology undergraduates understand some key genetics concepts poorly. One concept requiring attention is dominance, which many students understand as a fixed property of an allele or trait and regularly conflate with frequency in a population or selective advantage. We present the Dominance Concept Inventory (DCI), an instrument to gather data on selected alternative conceptions about dominance. During development of the 16-item test, we used expert surveys (n = 12), student interviews (n = 42), and field tests (n = 1763) from introductory and advanced biology undergraduates at public and private, majority- and minority-serving, 2- and 4-yr institutions in the United States. In the final field test across all subject populations (n = 709), item difficulty ranged from 0.08 to 0.84 (0.51 ± 0.049 SEM), while item discrimination ranged from 0.11 to 0.82 (0.50 ± 0.048 SEM). Internal reliability (Cronbach''s alpha) was 0.77, while test–retest reliability values were 0.74 (product moment correlation) and 0.77 (intraclass correlation). The prevalence of alternative conceptions in the field tests shows that introductory and advanced students retain confusion about dominance after instruction. All measures support the DCI as a useful instrument for measuring undergraduate biology student understanding and alternative conceptions about dominance.  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