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   13868篇
  免费   102篇
  国内免费   11篇
教育   9010篇
科学研究   2622篇
各国文化   78篇
体育   866篇
综合类   12篇
文化理论   134篇
信息传播   1259篇
  2021年   109篇
  2020年   137篇
  2019年   219篇
  2018年   323篇
  2017年   344篇
  2016年   359篇
  2015年   257篇
  2014年   245篇
  2013年   1990篇
  2012年   365篇
  2011年   362篇
  2010年   258篇
  2009年   192篇
  2008年   228篇
  2007年   230篇
  2006年   185篇
  2005年   805篇
  2004年   593篇
  2003年   426篇
  2002年   254篇
  2001年   230篇
  2000年   203篇
  1999年   174篇
  1998年   85篇
  1997年   95篇
  1996年   116篇
  1995年   81篇
  1994年   95篇
  1993年   93篇
  1992年   132篇
  1991年   140篇
  1990年   145篇
  1989年   163篇
  1988年   121篇
  1987年   119篇
  1986年   158篇
  1985年   152篇
  1984年   127篇
  1983年   129篇
  1982年   113篇
  1981年   93篇
  1980年   103篇
  1979年   138篇
  1978年   120篇
  1977年   106篇
  1976年   103篇
  1974年   111篇
  1973年   93篇
  1972年   84篇
  1971年   108篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
Reform‐based curriculum materials have been suggested as a mechanism to make inquiry‐based instruction more prevalent in secondary science classrooms, specifically when accompanied by comprehensive professional development (Loucks‐Horsley, Hewson, Love, & Stiles, 1998 ; Powell & Anderson, 2002 ). This research examines the implementation of a reform‐based high school chemistry curriculum in a large, urban school district. We explicitly consider the role of the teachers' knowledge and beliefs in their implementation of the reform‐based chemistry curriculum, as well as school level factors. Qualitative and quantitative data were collected in the form of beliefs interviews and classroom observations from 27 high school chemistry teachers. Analysis of the data revealed that implementation of the curriculum was strongly influenced by the teachers' beliefs about teaching and learning, and the presence of a supportive network at their school sites. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 883–907, 2007  相似文献   
142.
Two cohorts of children from inner-city elementary schools were provided a tutoring intervention to help in their transition to new schools. Participants were third, fourth, and fifth grade children who were identified as having low-income status, evidencing lags on achievement tests, and experiencing stressful life events. The intervention involved an orientation program with twice weekly paraprofessional tutoring. Two and three year academic and sociometric follow-up data were collected. Those provided the intervention evidenced some improvements over time, and these changes were most prominent in the area of reading grades. Fewer significant findings were found on sociometric indices.  相似文献   
143.
This paper outlines the design of a physics textbook that addresses issues of gender-inclusive physics teaching, STS and constructivism. Difficulties of addressing these issues in a textbook for normal classes, which has to compete with other textbooks on the market will be discussed. Specializations: constructivist approaches in science education research and practice. Specializations: gender issues in science instruction. Specializations: primary education, integrated science. Specializations: STS, phenomenological oriented physics instruction. Specializations: peace education within science education.  相似文献   
144.
145.
146.
147.
This study explored the role of student (e.g., age, language background, gender), home (e.g., parent/caregiver education), and school (e.g., school type, size) socio-demographic factors in students’ school (e.g., in-school arts tuition, arts engagement), home (e.g., parent/caregiver–child arts interaction), and community (e.g., arts attendance, arts tuition) arts participation. The sample comprised 1172 elementary and secondary school students from 15 schools. Findings revealed that student and home socio-demographic factors were the most salient in predicting arts participation across school, home, and community contexts. Age, gender, and prior achievement were the key student socio-demographic factors, while parent/caregiver education and occupation were also associated with students’ arts participation. Implications for practice and intervention pertinent to young people’s arts participation are discussed.  相似文献   
148.
The interrelationship among language components is the main conceptual framework for this study which examined the written language performance of Jamaican children with severe to profound hearing loss. Twelve subjects aged 15 to 16 years completed text level tasks in writing, reading and sign language. Hearing children aged 13 to 14 years completed writing and reading tasks. Multilevel analyses were undertaken. Differences and parity in performances were observed within and between groups at the word, sentence and text levels. Deaf children's ability to express complex ideas in sign language in the Jamaican education system indicated a need for nontraditional approaches in the teaching of written language. Suggestions are outlined for developing an instructional model to enhance written language using a bilingual approach.  相似文献   
149.
150.
This paper reports research on the effects of variations in injection velocity and permeability on the heat transfer and flow through a highly porous medium between two horizontal parallel plates situated at constant distance with constant suction by the upper plate. Due to this type of variation in injection velocity and in permeability the flow becomes three dimensional. The governing equations are solved by adopting complex variable notations to obtain the expressions for the velocity and temperature field. The skin-friction along the main flow direction and rate of heat transfer are discussed with the help of graphs.  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