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   3740篇
  免费   39篇
教育   2618篇
科学研究   317篇
各国文化   59篇
体育   339篇
综合类   2篇
文化理论   50篇
信息传播   394篇
  2022年   19篇
  2021年   37篇
  2020年   69篇
  2019年   108篇
  2018年   122篇
  2017年   114篇
  2016年   94篇
  2015年   63篇
  2014年   112篇
  2013年   850篇
  2012年   85篇
  2011年   94篇
  2010年   77篇
  2009年   76篇
  2008年   80篇
  2007年   74篇
  2006年   92篇
  2005年   81篇
  2004年   73篇
  2003年   71篇
  2002年   54篇
  2001年   48篇
  2000年   56篇
  1999年   52篇
  1998年   55篇
  1997年   46篇
  1996年   40篇
  1995年   35篇
  1994年   34篇
  1993年   39篇
  1992年   32篇
  1991年   39篇
  1990年   43篇
  1989年   42篇
  1988年   45篇
  1987年   43篇
  1986年   35篇
  1985年   32篇
  1984年   37篇
  1983年   43篇
  1982年   32篇
  1981年   21篇
  1980年   26篇
  1979年   42篇
  1978年   37篇
  1977年   29篇
  1976年   32篇
  1974年   24篇
  1973年   26篇
  1969年   19篇
排序方式: 共有3779条查询结果,搜索用时 46 毫秒
981.
A century ago, John Dewey and his daughter Evelyn published Schools of To-morrow to nearly universal acclaim. However, over the course of the 20th century, critics of Dewey have drawn upon Schools of To-morrow to accuse him of being an uncritical disciple of French philosopher, Jean Rousseau, of being opposed to the transmission of content to students, and most recently of endorsing a curriculum that patronized Black students. As a result, the text has become John Dewey's most controversial and problematic. In this historical study, we seek to place Schools of To-morrow in its historical, intellectual, and social context. The first part of the study traces the writing and publication of the text, as well as its changing reception over the past century. The second part of the study directly responds to the three criticisms previously cited: that Dewey was a disciple of Rousseau, that Dewey was opposed to the transmission of content knowledge, and that Dewey endorsed the racially segregated school system of Indianapolis depicted in the text. Drawing upon Dewey's other writings, his course syllabi, his personal correspondence, and lecture notes, we argue that the first two accusations are unfounded, but the third is partially accurate, although incomplete. We conclude that Schools of To-morrow is an undervalued text in the Dewey cannon that warrants closer study.  相似文献   
982.
Background: Professionals who use measures of adaptive behaviour when working with special populations may assume that adaptive behaviour is a consistent and linear construct at various ability levels and thus believe the construct of adaptive behaviour is the same for high and low performers. That is, highly adaptive people simply are assumed to have a higher level of adaptive behaviour than their less adaptive peers (i.e. individuals with special need, including intellectual disability). This study examines the viability of this assumption and poses an alternative hypothesis: adaptive behaviour is qualitatively different for high and low performers. Methods: Portions of the Adaptive Behaviour Assessment System-II’s standardisation sample were used to examine the structure of adaptive behaviour in high and low performers. Results. Results of factor analysis indicated that the amount of variance attributable to a general factor of adaptive behaviour declines at lower levels of adaptive ability, indicating that adaptive behaviours are not organised in the same manner across the spectrum of adaptive ability. Conclusions: Additionally, knowledge of an individual’s adaptive skills, not merely their general adaptive composite, seemingly is especially important when working with special needs children and youth who display deficits in adaptive behaviour.  相似文献   
983.
984.
The gap in achievement in mathematics between at-risk students and their more advantaged counterparts is a persistent problem of the U.S. education system. Although some research-based curricula and pedagogy have demonstrated promise in supporting students from diverse backgrounds to develop conceptual understanding and procedural fluency in mathematics, scaling up instructional change across a district organization is a significant challenge. The Middle School Mathematics and the Institutional Setting of Teaching (MIST) Project is a research–practice partnership seeking to understand how large urban school districts can support the development of rigorous and equitable middle-school mathematics instruction at scale. This article enumerates the goals and design of this multiyear, multidistrict partnership, and describes one illustrative example of how our partnership activities informed and supported one district's efforts to improve mathematics instruction over multiple years. General recommendations for district–researcher partnerships are discussed.  相似文献   
985.
986.
987.
988.
C-tests are gap-filling tests widely used to assess general language proficiency for purposes of placement, screening, or provision of feedback to language learners. C-tests consist of several short texts in which parts of words are missing. We addressed the issue of local dependence in C-tests using an explicit modeling approach based on testlet response theory. Data were provided by a total sample of 4,708 participants working on eight C-test texts with 20 gaps each. The resulting parameter estimates were compared to those obtained from (a) a polytomous item response theory (IRT) model and (b) a standard IRT model that ignored the dependence structure. Testlet effects proved to be very small and correspondence between parameters obtained from the different modeling approaches was high. When local dependence was ignored reliability of the C-test was slightly overestimated. Implications for the analysis of testlets in general, and C-tests in particular are discussed.  相似文献   
989.
This study explores the perspectives of education practitioners towards the process of reintegrating pupils (many of whom display social, emotional and behavioural difficulties), from a pupil referral unit (PRU) to mainstream educational provision in a rural bilingual Welsh authority, and examines the barriers and facilitators they identified as evident within their individual schools and catchment area served with regards to reintegrating and including pupils. The study locates the process within a specific geographical context and discusses whether there are specific reintegration barriers and facilitators inherent within the setting. Patterns of pupil referral and reintegration between the PRU and mainstream schools were examined and analysed from “pupil tracking data” which tracked pupils throughout an academic year from their arrival at the PRU before the perspectives of education practitioners towards potential reintegration barriers and facilitators were gathered through an initial expert sample and a second landscape sample postal questionnaire. Interviews were subsequently conducted with respondents from Primary, Secondary and PRU settings to drill down into the influence of specific barriers and facilitators identified earlier. This study suggests that although generic reintegration barriers and facilitators may be evident within all settings, there were specific factors inherent within this geographical context identified by education practitioners, which acted in the most part as barriers to successful reintegration and inclusion.  相似文献   
990.
Microfluidic spirals were used to successfully separate rare solid components from unpretreated human whole blood samples. The measured separation ratio of the spirals is the factor by which the concentration of the rare component is increased due to the Dean effect present in a flow profile in a curved duct. Different rates of dilution of the blood samples with a phosphate-buffered solution were investigated. The diameters of the spherical particles to separate ranged from 2 μm to 18 μm. It was found that diluting the blood to 20% is optimal leading to a separation ratio up to 1.97. Using two spirals continuously placed in a row led to an increase in separation efficacy in samples consisting of phosphate-buffered solution only from 1.86 to 3.79. Numerical investigations were carried out to display the flow profiles of Newtonian water samples and the shear-thinning blood samples in the cross-section of the experimentally handled channels. A macroscopic difference in velocity between the two rheologically different fluids could not be found. The macroscopic Dean flow is equally present and useful to help particles migrate to certain equilibrium positions in blood as well as lower viscous Newtonian fluids. The investigations highlight the potential for using highly concentrated, very heterogeneous, and non-Newtonian fluidic systems in known microsystems for screening applications.  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