全文获取类型
收费全文 | 2391篇 |
免费 | 54篇 |
国内免费 | 2篇 |
专业分类
教育 | 1905篇 |
科学研究 | 76篇 |
各国文化 | 31篇 |
体育 | 138篇 |
综合类 | 1篇 |
文化理论 | 13篇 |
信息传播 | 283篇 |
出版年
2023年 | 13篇 |
2022年 | 20篇 |
2021年 | 33篇 |
2020年 | 43篇 |
2019年 | 79篇 |
2018年 | 108篇 |
2017年 | 122篇 |
2016年 | 126篇 |
2015年 | 73篇 |
2014年 | 97篇 |
2013年 | 515篇 |
2012年 | 77篇 |
2011年 | 91篇 |
2010年 | 59篇 |
2009年 | 67篇 |
2008年 | 68篇 |
2007年 | 70篇 |
2006年 | 51篇 |
2005年 | 39篇 |
2004年 | 43篇 |
2003年 | 34篇 |
2002年 | 32篇 |
2001年 | 29篇 |
2000年 | 32篇 |
1999年 | 20篇 |
1998年 | 15篇 |
1997年 | 25篇 |
1996年 | 24篇 |
1994年 | 12篇 |
1993年 | 19篇 |
1992年 | 24篇 |
1991年 | 23篇 |
1990年 | 19篇 |
1989年 | 26篇 |
1988年 | 17篇 |
1987年 | 29篇 |
1986年 | 19篇 |
1985年 | 15篇 |
1984年 | 11篇 |
1983年 | 16篇 |
1982年 | 15篇 |
1981年 | 10篇 |
1980年 | 15篇 |
1979年 | 18篇 |
1978年 | 14篇 |
1977年 | 18篇 |
1975年 | 9篇 |
1974年 | 11篇 |
1973年 | 12篇 |
1971年 | 10篇 |
排序方式: 共有2447条查询结果,搜索用时 15 毫秒
41.
42.
A comprehensive, quantitative evaluation of an educational intervention program designed to reduce the attrition of minorities from the biological sciences was undertaken to ascertain whether such efforts adequately address the problem. Program participants had greater odds of persisting in basic math and science courses, and of graduating in biology, than did a comparison group, controlling for demographics and academic preparation. Undergraduate research greatly increased the odds of positive graduation outcomes. Program participants were also more likely to pursue graduate study than were university graduates overall. This evaluation demonstrates the value of such programs in increasing the representation of minorities in science. ? 2004 Wiley Periodicals, Inc. J Res Sci Teach 41: 861‐881, 2004. 相似文献
43.
44.
A different type of charter school: in prestige charters,a rise in cachet equals a decline in access 总被引:1,自引:0,他引:1
This paper seeks to elucidate a specific type of charter school. While much has been written about school choice and the expanding charter school segment, a growing and important number of charter schools do not fit in to the common understanding of these schools. Distinct from many of their counterparts, prestige charter schools have the following two features: elements which foster a reputation similar to that of elite private schools and a student population demographically distinct from local public district schools – whereby the prestige charters serve a disproportionate number of advantaged families. The prestige elements include: founding by advantaged community members; parental involvement; wait lists; popularity with advantaged professionals; high test scores; and niche themes. The authors will show through two in-depth case studies that prestige charter schools work hand-in-hand with gentrification in urban neighborhoods, and result in racial and class segregation and inequality. This paper examines how these charter schools struggle when a rise in prestige coincides with a decline in access for low-income students. The authors recommend that given the current system of school choice, prestige charter schools must use tools and mechanisms to maintain demographic diversity and educational equity which is in the best interest of all children. 相似文献
45.
Pedagogical Agents as Learning Companions: The Role of Agent Competency and Type of Interaction 总被引:1,自引:0,他引:1
Yanghee Kim Amy L. Baylor 《Educational technology research and development : ETR & D》2006,54(3):223-243
This study was designed to examine the effects of the competency (low vs. high) and interaction type (proactive vs. responsive)
of pedagogical agents as learning companions (PALs) on learning, self-efficacy, and attitudes. Participants were 72 undergraduates
in an introductory computer-literacy course who were randomly assigned to one of four treatments: Low-Proactive, Low-Responsive,
High-Proactive, and High-Responsive. Results indicated a main effect for PAL competency. Students who worked with the high-competency
PAL in both proactive and responsive conditions achieved higher scores in applying what they had learned and showed more positive
attitudes toward the PAL. However, students who worked with the low-competency PAL reported significantly enhanced self-efficacy
beliefs in the learning tasks. Also, there was a main effect far PAL interaction type. A proactive PAL had a significantly
positive impact on recall. These different results on learning and motivational outcomes suggest that the competency and interaction
type of a PAL should be designed according to the desired learning and motivational goals. 相似文献
46.
47.
48.
The Effect of Hearing Impairment on the Quality of Attachment and Mother-Toddler Interaction 总被引:1,自引:0,他引:1
In the present study, 41 hearing impaired and 41 hearing toddlers together with their hearing mothers were observed in Ainsworth's Strange Situation and during free play. Both security of attachment and ratings of maternal and toddler behavior during free play were remarkably similar for the hearing impaired and hearing dyads. In addition, security of attachment was related to the ratings of maternal and toddler behavior in a similar way for the hearing impaired and hearing toddlers. The results suggest that development of a secure attachment and maintaining a good mother-toddler relationship does not depend on normal language development during the toddler years. 相似文献
49.
50.
This longitudinal study examined how separation and family conflict mediated the effects of two acculturation variables (English language use and generational status) on substance use (alcohol, tobacco, and marijuana use) and deviant behavior outcomes in a Mexican American high school age sample. Structural equation modeling indicated that separation was a significant mediator of the relationship between acculturation and alcohol use, tobacco use, and deviant behavior. Family conflict mediated the effects of acculturation on marijuana use and deviant behavior. Model comparisons across gender groups suggested that generational status was an influential acculturation measure for females but not males. Additionally, English language use maintained a direct effect on marijuana use among females, whereas this relationship was mediated by separation for males. 相似文献