The Potential Impacts of Upcoming High-Stakes Testing on the Teaching of Science in Elementary Classrooms     

Rose M. Pringle  Sarah Carrier Martin 《Research in Science Education》2005,35(2-3):347-361

In 1983, the National Commission on Excellence in Education in the United States issued a report called A Nation at Risk: The Imperative for Educational Reform. This report and other policy initiatives such as the No Child Left Behind Legislation recommended that the individual states institute assessments to hold schools accountable. This research explored the potential impact of impending standardised testing on teaching science in elementary schools in one school district in Florida. We explored the teachers' concerns about the upcoming high-stakes tests in science, possible impact on their curriculum and what changes, if any, will be made in the approach to science teaching and learning in their classrooms. As the teachers look toward the implementation of high-stakes testing in science, they have recognised the need to teach science. This recognition is not borne out of the importance of science learning for elementary school children, but rather out of fear of failure and the effects of tangible rewards or punishments that accompany high-stakes testing. In anticipation, the teachers are preparing to align their teaching to the science standards while aggressively searching for test preparatory materials. Schools are also involved in professional development and structural changes to facilitate teaching of science.  相似文献   

谫议何其芳“现代格律诗”理论     

王永 《石家庄学院学报》2007,9(4):38-43

在20世纪50年代关于诗的形式问题的讨论中,何其芳提出了现代格律诗理论。这种现代格律诗理论的提出有着不同于闻一多的初衷。何其芳研究新格律诗有几个参照系,即古典诗歌、民歌、国外诗歌和五四以来的新诗。何其芳的诗歌理论在关于新诗的格律的探索中有着其不可或缺的价值,但运用到诗歌写作的实践中也存在局限。  相似文献   

软件构件技术的研究     

吴俊  吴方刚 《扬州职业大学学报》2002,6(3):30-32

软件构件技术是当前软件界研究的热点 ,而当前构件产品的开发标准仍处在探讨阶段 ,如何在实际开发中把握构件的开发标准是我们研究的重点 ,为此 ,本文通过对构件模型的阐述和比较 ,探讨了构件、构件系统的评价标准  相似文献   

改进信任度的商品推荐算法研究     

高雄  何利力 《教育技术导刊》2019,18(7):75-79

对于有个性化推荐需求的电子商务系统,传统协同过滤推荐算法对商品的用户项目矩阵构建比较单一,难以解决数据稀疏以及推荐结果精度较低等问题。为此,提出一种改进的基于信任度的协同过滤算法,根据用户历史行为,对用户项目评分矩阵进行细分量化,综合考虑用户间关系,引入信任因子维持用户信任关系中的非对称性,通过共同评分项计算用户评分信任度。最终融合信任度与信任因子,计算获得最佳邻居集并产生最终推荐列表。在淘宝官方UserBehavior数据集下进行实验,结果表明,该算法降低了推荐稀疏性,提高了推荐精度。  相似文献   

MFV-Class: a multi-faceted visualization tool of object classes     

张志猛  潘云鹤  庄越挺 《Journal of Zhejiang University. Science. B》2004,(11)

INTRODUCTION The increasingly complex and large number ofsoftware products in today’s software industrymakes the tasks of software maintenance, softwarereuse and software restructuring more and moredifficult. With the popularity of the object-orientedprogramming paradigm, the ability to reverse en-gineer and understand object-oriented legacy sys-tems has become an important problem to be ad-dressed. In the object-oriented reverse engineering(OORE) research area, most researchers f…  相似文献   

谫议何其芳"现代格律诗"理论     

王永 《石家庄学院学报》2007,9(4):38-43

在20世纪50年代关于诗的形式问题的讨论中,何其芳提出了现代格律诗理论.这种现代格律诗理论的提出有着不同于闻一多的初衷.何其芳研究新格律诗有几个参照系,即古典诗歌、民歌、国外诗歌和五四以来的新诗.何其芳的诗歌理论在关于新诗的格律的探索中有着其不可或缺的价值,但运用到诗歌写作的实践中也存在局限.  相似文献   

切片作用域对基于数据切片类内聚性度量的影响     

周毓明  徐宝文 《东南大学学报》2008,24(2)

提出应该使用类而不是方法作为切片作用域来计算类的内聚性．首先,对一个给定的属性,找出每个方法中对该属性最后一次定义的语句．然后,以类为切片作用域计算这些语句相对于该属性的前向和后向数据切片,通过合并得到该属性的类数据切片．最后,在所有属性的类数据切片的基础上计算类的内聚性．与传统的以方法为切片作用域的内聚性度量相比,以类为切片作用域的内聚性度量考虑了类中方法之间可能存在的交互．实验结果表明,当使用类为切片作用域时,所得的度量值能更准确地量化类的内聚性．  相似文献   

Semiotic Principles for Metadata Auditing and Evaluation     

Erik Radio 《Cataloging & classification quarterly》2016,54(2):117-135

Metadata auditing is a common practice used to assess quality by drawing on a selection of documents to create a representative sample of the corpus. This article examines common techniques involved in auditing and argues that underlying semiotic principles should be considered before remediation and transformation work are undertaken. This article provides an inquiry into the structural nature of metadata, records, and corpora to analyze the semiotic processes and boundaries that can affect audits. Suggestions for effective auditing practices are offered as well as what can be obfuscated when transformations are undertaken without concern for the sign-functions of metadata.  相似文献   

Developing Standards for Emerging Forms of Assessment: The NISO Altmetrics Initiative     

Todd A. Carpenter  Nettie Lagace  Sara Bahnmaier 《期刊图书馆员》2016,70(1-4):85-88

New types of calculation methodologies, called altmetrics, which is short for alternative metrics, are increasingly being used to measure and analyze the scholarly communication networks of researchers, librarians, publishers, and funding organizations. By applying altmetrics to emergent online forums like Twitter, Academia.edu, Mendeley, and ResearchGate, studies have shown that early measures of social attention to a work or body of work can be correlated with later usage and citation statistics to predict the diffusion and impact of research output. However, standards for altmetrics are needed to build confidence and trust among the information community.  相似文献   

基于学科规范引文影响力与同行评议相关性的科学评价实证研究   总被引：1，自引：0，他引：1  

宋丽萍  王建芳 《图书情报工作》2018,62(18):122-128

[目的/意义]分析学科规范引文影响力在科学评价中的可行性及其与同行评议的相关性,为负责任计量及以其为支撑的同行评议提供借鉴。[方法/过程]选取F1000以及InCites平台,将29 850篇细胞生物学文献、30 326篇生物技术文献的CNCI （学科规范化引文影响力）与被引频次进行相关分析,对其中956篇细胞生物学论文的CNCI与F1000分值进行斯皮尔曼相关系数检验。[结果/结论]研究结果表明,从统计学视角看CNCI与被引频次呈高度正相关,与F1000分值呈显著正相关,同时亦存在二者相悖的情形。因此,CNCI在一定程度上能够反映同行评议结果、能代偿实施学术影响力归誉的功能,并适用于跨学科比较;但同行评议或CNCI单独作为科学评价标准都会有失偏颇,以CNCI为代表的新一代负责任计量指标为支撑的同行评议将成为未来科学评价的主流。  相似文献