全文获取类型
收费全文 | 116112篇 |
免费 | 1873篇 |
国内免费 | 233篇 |
专业分类
教育 | 80065篇 |
科学研究 | 13213篇 |
各国文化 | 1976篇 |
体育 | 9196篇 |
综合类 | 170篇 |
文化理论 | 1054篇 |
信息传播 | 12544篇 |
出版年
2021年 | 904篇 |
2020年 | 1650篇 |
2019年 | 2566篇 |
2018年 | 3041篇 |
2017年 | 3315篇 |
2016年 | 3360篇 |
2015年 | 2305篇 |
2014年 | 3182篇 |
2013年 | 27293篇 |
2012年 | 2337篇 |
2011年 | 2642篇 |
2010年 | 2298篇 |
2009年 | 2605篇 |
2008年 | 2330篇 |
2007年 | 2066篇 |
2006年 | 2316篇 |
2005年 | 2299篇 |
2004年 | 2921篇 |
2003年 | 2241篇 |
2002年 | 2056篇 |
2001年 | 1868篇 |
2000年 | 1440篇 |
1999年 | 1337篇 |
1998年 | 1272篇 |
1997年 | 1332篇 |
1996年 | 1551篇 |
1995年 | 1350篇 |
1994年 | 1341篇 |
1993年 | 1342篇 |
1992年 | 1332篇 |
1991年 | 1235篇 |
1990年 | 1264篇 |
1989年 | 1158篇 |
1988年 | 1020篇 |
1987年 | 953篇 |
1986年 | 992篇 |
1985年 | 1221篇 |
1984年 | 1127篇 |
1983年 | 1063篇 |
1982年 | 1065篇 |
1981年 | 998篇 |
1980年 | 953篇 |
1979年 | 1040篇 |
1978年 | 1031篇 |
1977年 | 946篇 |
1976年 | 857篇 |
1975年 | 691篇 |
1974年 | 690篇 |
1973年 | 668篇 |
1972年 | 506篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
The ability to read relies upon not just decoding, but also comprehending text. Being a good comprehender requires strategic reading and implies the use of comprehension strategies. Research indicates that readers who are taught several reading comprehension strategies have better reading skills than those only taught a single strategy. One multiple strategy reading comprehension intervention was evaluated using a mixed-model quasi-experimental design. Intervention and control conditions groups were assessed at pre- and post-test points with standardised reading comprehension abilities, measured as the primary outcome measure. Implementation science principles were observed and evaluated. The schools all served areas of low socio-economic status. 74 pupils (aged 9–10) in five classes in four primary-level mainstream schools in a Scottish local authority were recruited as participants. Training was provided to participating schools by the first author and the programme was delivered in four sessions of 45 minutes per week for 8 weeks. An ANCOVA revealed a statistically significant effect of condition. Statistically significant scores were also evident in the secondary outcome measures of decoding of target word skills, children’s self-reports of their reading strategy use and recreational reading frequency. Implementation tools indicated that the intervention was acceptable and feasible to implement. Implications of introducing this multiple strategy reading comprehension programme and of the evaluation of implementation are discussed. 相似文献
92.
Investigating the effectiveness of instructional practices provides an evidence base to inform instructional decisions. Synthesizing research studies on instructional effectiveness provides an estimate of the generalizability of effectiveness across settings, along with an exploration of factors that may moderate the impact, which cannot be achieved within individual studies. This study sought to provide a synthesis of evidence-based instructional practices (EBIPs) particular to chemistry through meta-analysis. Ninety-nine studies were analyzed comprising a broader view of chemistry specific studies than past meta-analyses. The results showed that EBIPs feature a demonstrably positive impact on students' academic performance in chemistry, although assessment topic coverage and setting size emerged as relevant moderators of impact and prevented making definitive conclusions of the relative impact of each EBIP. In examining publication bias, an asymmetric distribution of studies based on standard error (SE) and effect size was found, indicative of potential publication bias. To explore the potential impact of bias, the trim and fill method was employed resulting in a range for the overall weighted effect size from 0.29 to 0.62. The study concludes that evidence-based instructional practices have demonstrated effectiveness even in consideration of potential publication bias, as the range of effect sizes remains positive, but highlights the continued need to publish null findings in the research literature. 相似文献
93.
Gaowei Chen Jiahong Zhang Carol K. K. Chan Sarah Michaels Lauren B. Resnick Xiaorui Huang 《British Educational Research Journal》2020,46(3):631-652
This study seeks to understand the emotional connection of teachers' academically productive talk (APT) with student learning from the students' perspective. Using a sample of 2,225 students (N7th grade = 1,146 and N8th grade = 1,079) from 16 middle schools in a city of China, we investigate the relationship between students' perceptions of their teachers’ APT, student emotions (enjoyment and anxiety) and their discursive engagement with others in the mathematics classroom. Results from structural equation modelling and mediation analysis show that after controlling for gender, family resources and mathematics achievement, student-perceived teacher APT was positively associated with their discursive engagement with classmates. Furthermore, student enjoyment and anxiety in class mediated the relationship between student-perceived teacher APT and student discursive engagement with classmates. Multi-group analysis revealed that the model was invariant across genders and grades, indicating that the associations were applicable to male and female students as well as to seventh and eighth graders. These findings shed light on the emotional relationship of teacher APT with the discursive engagement of their students. Although prior research observes a positive relationship between teacher productive classroom talk and student discursive engagement primarily through classroom observations and teacher reflections, this study provides evidence from the students’ perspective and highlights the mediating role of student emotions in the relationship. 相似文献
94.
95.
96.
This study utilized data from the Avon Longitudinal Study of Parents and Children (N = 14,860) to examine whether early-life family income (age 0–5) predicted long-term academic achievement (age 16–18) and to investigate the role of executive function (EF) assessed multiple times across age 7–11 in explaining this association. Task-based EF was a significant mediator between early-life family income and later academic achievement in every model. This mediating pathway persisted when adjusting for a comprehensive panel of covariates including verbal IQ, sex, family income at ages 8 and 18, and early-life temperament. Additionally, teacher-rated and parent-rated EF mediated in some models. Overall, these findings suggest that childhood EF may play an important role in perpetuating income-based educational disparities. 相似文献
97.
School psychologists in today's schools have the unique opportunity—and responsibility—to guide identification for gifted programs. “Who is gifted?” remains a perennial question in the gifted education literature, not answered by group intelligence screeners that purportedly level the playing field for all. As the student body grows more diverse, there is increasing necessity to ensure that all students have equal access to gifted programs. Failure to identify and develop the advanced abilities of gifted children who are culturally diverse, economically deprived, highly gifted, or twice exceptional is justifiably viewed as a civil rights violation. The National Association for Gifted Children's 2018 position statement, “Use of the WISC-V for Gifted and Twice Exceptional Identification,” offers important considerations for identifying the gifted. Based on a national research study of 390 gifted children on the Wechsler Intelligence Scale for Children, Fifth Edition (WISC-V), the statement recommends that the traditional practice of mandating Full Scale intelligence quotient scores be abandoned. Instead, it embraces the use of any one of six expanded index scores that are better measures of abstract reasoning for selecting students for gifted provisions. As gifted children are oftentimes asynchronous, alternate index scores are less biased and better able to document the strengths of all gifted children. What is learned from the WISC-V can be applied by school psychologists to improve the choice of comprehensive individual intelligence tests, brief intelligence tests, and the body of evidence gifted children must exhibit. 相似文献
98.
John Jerrim Luis Alejandro Lopez-Agudo Oscar D. Marcenaro-Gutierrez 《European Journal of Education》2020,55(2):248-260
The association between time devoted to homework and children's academic achievement has long been an issue of great debate. A small number of mainly correlational studies have been conducted into this issue in a primary school setting, but have produced somewhat mixed results. In this paper we contribute to this literature by investigating the relationship between time spent upon homework and children's outcomes across 24 countries. By using a student fixed-effects approach, capturing differences in homework time amongst the same student across different school subjects, we argue that our results are likely to be subject to less confounding than much of the existing literature. We find little evidence that the amount of homework time primary school children are assigned is related to their academic achievement. This holds true across a large number of countries, survives various robustness tests and does not vary by gender or socio-economic status. We interpret this finding as suggesting that the homework assigned to primary school pupils may not be adequate to produce a positive association, and needs be improved if this time-consuming activity is ever going to bring benefits for children's academic achievement. 相似文献
99.
Haseeb Md. Irfanullah 《Learned Publishing》2021,34(1):57-63
- Resilience in the publishing industry can be viewed through a framework of assessing five capitals or assets: human, social, physical, financial, and natural capital.
- A resilient system requires four properties: robustness, redundancy, resourcefulness, and rapidity, and scholarly publishing can be seen to have some element of each.
- The ability to thrive in adversity and bounce back is not found in all parts of the publishing system, with those in the Global South disproportionately disadvantaged.
- The positive changes introduced in the past year need to be retained and elements of inequality and exclusion removed to ensure future resilience and sustainability.
100.
ABSTRACTThe literature on momentum is still undecided, with mixed results whether momentum exists or is only perceived to exist (“hot hand fallacy”). We explore whether momentum exists by looking at cases in which a basketball player has three consecutive free throws. A free throw is a well-defined task executed in a stable environment, allegedly giving momentum optimal chances to occur. Taking 14 NBA seasons we collected over 4500 three-free-throw sets (triplets). We obtained the outcomes of the shots as well as some additional variables about the player and the game: the player’s average free-throw percentage, home or away, and the game score and the quarter when the free throws were attempted. We first analyse the hit rates in the three shots and then proceed to regression analysis that also controls for the abovementioned variables. We address several concerns raised in the literature. All comparisons and analyses yield the same conclusion that there is no evidence for momentum in the data. 相似文献