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181.
Young adolescents’ perceptions of teachers’ and peers’ multiple classroom supports were examined in relation to motivational outcomes (interest and social goal pursuit). Responses from sixth (n = 120), seventh (n = 115), and eighth (n = 123) grade students concerning four dimensions of support (expectations for specific behavioral and academic outcomes, provisions of help, safety, and emotional nurturing) indicated that social supports differ as a function of students’ sex, grade level, teacher, and classroom, and in their relations to interest and social goal pursuit. Relations of students’ perceptions to motivational outcomes differed as a function of source of support. In addition, students’ perceptions of teacher and peer supports differed as a function of teacher and classroom. In general, findings confirm the utility of a multi-dimensional approach to social support that acknowledges the independent as well as interactive contributions of teachers and peers to student motivation.  相似文献   
182.
The purpose of this study is to examine the relationship between teachers’ perceived student misbehaviour and emotional exhaustion, and the role of teacher efficacy beliefs (related to handling student misbehaviour) and emotion regulation in this relationship. Additionally, we examined teacher turnover intentions in relation to emotional exhaustion. Data were collected from 610 elementary, middle‐ and high‐school teachers using an online survey. Results indicate that despite the significant direct effect between the two emotion regulation strategies (cognitive reappraisal, expressive suppression) on emotional exhaustion, both strategies failed to show a mediating effect between perceived student misbehaviour and emotional exhaustion. However, teacher efficacy in handling student misbehaviour was found to mediate the relationship between perceived student misbehaviour and emotional exhaustion. In turn, a significant relationship was found between emotional exhaustion and turnover intentions. Furthermore, teacher perception of student misbehaviour was found to have a considerable indirect effect on teacher turnover intentions. Findings signify the importance of developing strategies that enhance teachers’ situation‐specific efficacy beliefs.  相似文献   
183.
Because entrepreneurial activity is a key source of economic growth, promoting youth entrepreneurship has become a priority for policymakers. School choice programs force administrators and teachers to be more entrepreneurial in their jobs by encouraging innovation and by creating competition and a more business-like environment in K-12 education. Does going to school in this climate make students more likely to become entrepreneurs? In this paper we test whether youth entrepreneurship rates are higher in counties with school choice programs. We find that voucher programs create higher rates of youth entrepreneurship, while charter schools do not, relative to traditional public schools.  相似文献   
184.
New Caledonian (NC) crows are the most sophisticated tool manufacturers other than humans. The diversification and geographical distribution of their three Pandanus tool designs that differ in complexity, as well as the lack of ecological correlates, suggest that cumulative technological change has taken place. To investigate the possibility that high-fidelity social transmission mediated this putative ratchet-like process, we studied the ontogeny of Pandanus tool manufacture and social organization in free-living NC crows. We found that juvenile crows took more than 1 year to reach adult proficiency in their Pandanus tool skills. Although trial-and-error learning is clearly important, juveniles have ample opportunity to learn about Pandanus tool manufacture by both observing their parents and interacting with artifactual material. The crows’ social system seems likely to promote the faithful social transmission of local tool designs by both favoring the vertical transmission of tool information and minimizing horizontal transmission. We suggest that NC crows develop their Pandanus tool skills in a highly scaffolded learning environment that facilitates the cumulative technological evolution of tool designs.  相似文献   
185.
This paper describes the highlights of an exploratory deep log analysis of journal usage on OhioLINK, conducted as part of the MaxData project. OhioLINK, the original ‘Big Deal’, provides a single digital platform of nearly 6,000 full‐text journals for more than 600,000 people in Ohio and the investigation aimed to assess it after approximately 10 years. The data was generated from an SPSS analysis of the raw (unprocessed) server logs for June 2004 to December 2004. Approximately 1,215,000 items were viewed on campus in October 2004 and 1,894,000 items viewed off campus between June and December 2004. There are a number of usage analyses including: demand and activity; number and name of journal; date of publication; subject/discipline of journal and method of searching/navigating.  相似文献   
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The present study examined the effect of strength and endurance training order on the endocrine milieu associated with strength development and performance during concurrent training. A randomised, between-groups design was employed with 30 recreationally resistance-trained males completing one of four acute experimental training protocols; strength training (ST), strength followed by endurance training (ST-END), endurance followed by strength training (END-ST) or no training (CON). Blood samples were taken before each respective exercise protocol, immediately upon cessation of exercise, and 1?h post cessation of exercise. Blood samples were subsequently analysed for total testosterone, cortisol and lactate concentrations. Ability to maintain 80% 1RM during strength training was better in ST and ST-END than END-ST (both p?<?.05). Immediately following the respective exercise protocols all training interventions elicited significant increases in testosterone (p?<?.05). ST and END-ST resulted in greater increases in cortisol than ST-END (both p?<?.05). The testosterone:cortisol ratio was similar following the respective exercise protocols. Blood lactate concentrations post-training were greater following END-ST and ST than ST-END (both p?<?.05). Conducting endurance exercise prior to strength training resulted in impaired strength training performance. Blood cortisol and lactate concentrations were greater when endurance training was conducted prior to strength training than vice versa. As such, it may be suggested that conducting endurance prior to strength training may result in acute unfavourable responses to strength training when strength training is conducted with high loads.  相似文献   
189.
The authors have been involved in two substantial Australian teacher professional development projects, with the Mathematical Association of Victoria and with the Science Teachers’ Association of Victoria, which focused, respectively, on a whole‐school professional development and an extended workshop programme. The research described in this paper explores the experiences of participants in these two programmes, in order to identify the advantages and limitations of each type of professional development model in supporting teacher development, and the different needs of teachers in relation to mathematics and science. The findings from a questionnaire, supported by participant interviews, show a range of differences in experience and outcomes due to programme style and subject area. These are used to suggest a developmental framework for conceptualizing teacher professional development needs.  相似文献   
190.
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