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   2328篇
  免费   68篇
教育   1899篇
科学研究   55篇
各国文化   45篇
体育   114篇
综合类   1篇
文化理论   6篇
信息传播   276篇
  2023年   14篇
  2022年   24篇
  2021年   31篇
  2020年   74篇
  2019年   120篇
  2018年   146篇
  2017年   173篇
  2016年   144篇
  2015年   93篇
  2014年   114篇
  2013年   549篇
  2012年   91篇
  2011年   97篇
  2010年   67篇
  2009年   71篇
  2008年   74篇
  2007年   62篇
  2006年   48篇
  2005年   35篇
  2004年   38篇
  2003年   41篇
  2002年   41篇
  2001年   16篇
  2000年   41篇
  1999年   22篇
  1998年   16篇
  1997年   17篇
  1996年   19篇
  1995年   15篇
  1994年   14篇
  1993年   7篇
  1992年   7篇
  1991年   9篇
  1990年   2篇
  1989年   4篇
  1988年   2篇
  1987年   3篇
  1986年   2篇
  1985年   6篇
  1984年   6篇
  1983年   2篇
  1982年   2篇
  1981年   4篇
  1980年   3篇
  1978年   4篇
  1972年   2篇
  1923年   3篇
  1922年   2篇
  1857年   1篇
  1844年   4篇
排序方式: 共有2396条查询结果,搜索用时 26 毫秒
101.
102.
Research in Science Education - Despite recommendations from science educational standards which claim that science teaching should engage students in scientific investigations the same way...  相似文献   
103.
Although the presence of toys in childhood has remained steady for decades, the types of toys that fill children's toy boxes have changed, especially over the last 10–15 years. Many of today's toys are marked by technological enhancements, from a shape sorter driven by a singing bear to robotic plastic animals designed to match a toddler's favorite television show. Although examining the effects of these changes is still an unexplored area, research to date suggests that there may be costs to the quality of caregiver–child interaction when using these toys together. This leads to two possibilities: (1) the design of the enhancements themselves hurt interactions; or (2) these toys can still be beneficial to interactions, but caregivers simply need to be aware of the potential pitfalls. In this study, we explore whether providing caregivers with a subtle cue about the potential negative impacts of technological toys on caregiver–child interaction affects their behavior.  相似文献   
104.
In recent years, there has been a strong push to transform STEM education at K-12 and collegiate levels to help students learn to think like scientists. One aspect of this transformation involves redesigning instruction and curricula around fundamental scientific ideas that serve as conceptual scaffolds students can use to build cohesive knowledge structures. In this study, we investigated how students use mass balance reasoning as a conceptual scaffold to gain a deeper understanding of how matter moves through biological systems. Our aim was to lay the groundwork for a mass balance learning progression in physiology. We drew on a general models framework from biology and a covariational reasoning framework from math education to interpret students' mass balance ideas. We used a constant comparative method to identify students' reasoning patterns from 73 interviews conducted with undergraduate biology students. We helped validate the reasoning patterns identified with >8000 written responses collected from students at multiple institutions. From our analyses, we identified two related progress variables that describe key elements of students' performances: the first describes how students identify and use matter flows in biology phenomena; the second characterizes how students use net rate-of-change to predict how matter accumulates in, or disperses from, a compartment. We also present a case study of how we used our emerging mass balance learning progression to inform instructional practices to support students' mass balance reasoning. Our progress variables describe one way students engage in three dimensional learning by showing how student performances associated with the practice of mathematical thinking reveal their understanding of the core concept of matter flows as governed by the crosscutting concept of matter conservation. Though our work is situated in physiology, it extends previous work in climate change education and is applicable to other scientific fields, such as physics, engineering, and geochemistry.  相似文献   
105.
Prediction markets designed to predict terrorism through traders’ investments on the likelihood of specific terrorist attacks are, strictly speaking, enabling those traders to bet on terrorism. Betting on terrorist attacks, like some other forms of betting on death, has been accused of being repugnant. In this paper, it is argued that while government-backed effective intelligence-gathering prediction markets on terrorism (PMsoT) might elicit feelings of repugnance, those feelings are likely to be misguided. The feelings of repugnance arise because PMsoT are assumed to be associated with terrorism in encouraging and endorsing ways and with human death in a disrespectful way. However, it is argued that these feelings of repugnance are misguided in the case of government-backed effective intelligence-gathering PMsoT because the purpose and effect of such prediction markets, and (on balance) the trading they encourage, is to prevent and renounce terrorism and show respect for matters of life and death.  相似文献   
106.
It's something they can relate to. You know, assimilate. They go there, talk in Spanish, not worry about it, drink, have fun, do it all in a language they're accustomed to, or at least with people they feel more comfortable with. I guess that's why a lot of them come Monday nights from these distances. That's what I was trying to explain to Chris. If you have a Latino night it's going to be successful because us as Latinos don't have a lot of options for us to go or places for us to go.  相似文献   
107.
108.
109.
This article explores how teachers can foster an environment that facilitates social problem solving when toddlers experience conflict, emotional dysregulation, and aggression. This article examines differences in child development and self-regulation outcomes when teachers engage in problem solving for toddlers and problem solving with toddlers. It also reviews teacher practices aimed at preventing problems. The article suggests a paradigm shift from perceiving social challenges as toddler problems to viewing such situations as problem solving opportunities. The article concludes by applying these principles to an actual classroom dispute among toddlers.  相似文献   
110.
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