排序方式： 共有212条查询结果，搜索用时 31 毫秒
1.
2.
随着教育改革的逐步深入,从"双基"到"三维目标"再到"核心素养",教育正从知识本位向人本位逐渐迁移,时代的变迁对中小学教师提出了更高的要求。但是,现阶段我国的中小学教师继续教育仍然存在许多不足和问题,笔者认为,要使中小学教师继续教育真正发挥实效,必须增大教师继续教育资金的投入,邀请一线教学经验丰富的名师担任讲师,变更培训时间,构建继续教育评价机制,从而让中小学教师继续教育健康、科学、有序地开展。 相似文献
3.
This paper examines the effects of high school detracking on Korean Scholastic Aptitude Test (KSAT) scores in the subjects of Korean (reading), mathematics, and English. We found that a transition to detracking reduces test scores by 0.16–0.18 of one standard deviation. Additionally, the administrative autonomy of private schools and the use of private tutoring services at home attenuate the negative effects of detracking. Our findings are in line with those in the previous literature showing a modest effect of tracking (i.e., ability sorting) in advanced countries where the autonomous school system is well organized and commercial educational services are easily accessible and a strong positive effect of tracking in developing countries where access to well-resourced private schools and private education is generally limited. 相似文献
4.
There is growing interest by both educators and policymakers in helping underperforming students catch up using computer assisted learning (CAL). While CAL interventions have been shown to be effective internationally and elsewhere in China, these have been mostly offline CAL programs that are difficult and costly to implement. An online CAL (OCAL) may be able to bypass many of offline CAL's implementation problems and enhance the remedial tutoring experience. The objective of this paper is to examine the impact of an OCAL intervention on the academic and non-academic performance of students and to explore the mechanism behind OCAL's impact. According to the findings, OCAL improved overall English scores of students in the treatment group relative to the control group by 0.48 standard deviations. This impact is large when compared with offline CAL programs previously evaluated in rural China. We found that OCAL also led to a positive change in the attitudes of students towards English learning and student aspirations for their future education level. We found three possible explanations for OCAL's impact. We believe that online features that enhance the interest-oriented stimulation of the software is the main source of improvement among students. Cost-effectiveness analysis showed that the OCAL program is more cost-effective than traditional offline CAL, which is suitable for policymakers as it indicates high potential for OCAL program expansion. 相似文献
5.
We study the effect of providing students with information on the returns to study effort in a large introductory microeconomics course. To do so, we use historical time-use data from the course’s online homework module to estimate the association between study time and course performance. We measure the impact of providing students this information on subsequent study effort, class attendance, homework scores, and exam performance using a randomized research design. Results show that the information contained in our intervention increased time spent studying by approximately 7% throughout the entire course, though this effect is imprecisely measured. However, when examining shorter-run outcomes (prior to the next exam) we find larger and more precisely estimated treatment effects on time spent on homeworks (12%) and homework scores (14% of a standard deviation). Treatment effects on longer run outcomes in the course are negligible. We additionally estimate large, but somewhat imprecise, average treatment effects on class attendance and small positive and insignificant average treatment effects on exam performance throughout the course. 相似文献
6.
In September 2018, Hurricane Florence caused widespread and extended school closures throughout North Carolina. Leveraging variation within schools over time, we explore heterogeneity in the impact of hurricane-related schooling disruption on students’ end-of-grade test scores. Impacts were not concentrated on students performing at the lowest levels in the prior year nor on those from the most disadvantaged backgrounds. Rather, the estimates suggest that most students experienced small declines in test performance irrespective of baseline human capital or demographic group. 相似文献
7.
1977-2010年柴达木盆地地表潜在蒸散时空演变趋势 总被引：4，自引：0，他引：4
本文采用Penman-Monteith 模型计算了柴达木盆地各站点的潜在蒸散量（PE）,利用Sen 趋势、Mann-Kendall检验、EOF模型分析了1977-2010年研究区内PE的时空演变趋势与地表湿润特征的异常空间分布,结合R/S分析模型对PE未来变化趋势进行预测,并运用多元回归方法定量分析各气象要素对潜在蒸散量变化的贡献率。结果表明：从时间变化趋势来看,34年来柴达木盆地潜在蒸散量呈显著下降趋势,并在1988年前后发生突变。由于气温呈上升趋势,该地存在“蒸发悖论”现象。从空间分布来看,PE从西北向东南逐渐递减,年际变化倾向率为-3.31mm/10a。未来变化中,大部分地区的变化趋势是增加的,因而暖湿化程度将减弱。柴达木盆地地表湿润特征的空间分布长年都保持着东部较湿润西部较干旱的分布型,近年来该种空间分布型变化趋势愈加明显。平均风速和平均气温的变化对柴达木盆地PE变化的贡献率最高。 相似文献
8.
科学认知能源富集区经济韧性演化过程与规律,是推动能源富集区经济转型和可持续发展的迫切需求。在演化韧性视角下构建能源富集区产业结构演替与经济韧性响应分析框架,采用区域经济韧性测度和分解模型,从主导产业动态变化、三次产业结构演替和区域经济韧性转化3个方面,研究1990—2019年能源富集区榆林市经济韧性演化过程与机制。结果表明：①榆林市经济韧性演化经历了“重组-开发、开发-维持和维持-释放”3个阶段,区域经济韧性呈前期和后期弱、中期强的倒“U”形曲线;②1990—1999年第一和第三产业竞争力与结构素质是影响榆林市经济韧性的主要原因,经济发展具有较强的路径突破能力,2000—2019年榆林市经济韧性的剧烈波动主要由第二产业竞争力的快速“增强-下降”所引起,经济发展的路径依赖性显著增强;③能源采掘业竞争力波动是榆林市能源化工产业韧性演化的主要动因,能源加工业和化工产业对能源化工产业韧性演化的作用日益增强。研究结果有助于为增强区域经济韧性,探索能源富集区经济转型和可持续发展路径提供科学依据。 相似文献
9.
快速工业化、城镇化和现代化使得乡村地域系统面临的压力愈加突出,对乡村人地关系及资源组合状况的研究,是面向乡村振兴战略,实现乡村地域协调与高质量发展的科学基础。基于2000—2018年黄土高原313个县级行政单元数据,在构建乡村“人水土”系统指标体系的基础上,采用熵权TOPSIS法、空间自相关模型、GWR模型等方法研究3个子系统的时空分异规律,识别系统间的协同关系及其主要类型,揭示系统协同演化驱动机制。结果表明：①黄土高原乡村人类活动强度指数和水资源指数空间分布格局具有一致性,与土地资源指数空间错位显著,3个子系统指数均以较低水平等级为主,县域间不平衡性突出,但有减弱趋势。②黄土高原乡村系统协同关系类型以双维度制约型为主,研究时段内该类型县域数量呈倒U型变化特征,综合协调型县区数量逐渐增多,说明乡村逐步向高水平协调方向发展。③系统协调发展受自然及社会经济要素形成的资源分布与组合、流动与分配、资源需求利用及人口流动转移四元驱动机制所影响,不同要素对系统权衡强度和协调状态的作用不同。本文对优化乡村地域水土资源配置,促进乡村“人水土”系统协调演进有一定的借鉴意义。 相似文献
10.
运用文献资料调研法、录像观察法、数理统计法、比较分析法对第21届世界女排大奖赛总决赛的五场比赛进行数理统计与对比,分析中国女排与其对手在比赛中的表现。 相似文献