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161.
Jason Ravitz 《Peabody Journal of Education》2013,88(3):290-312
This study describes the status of small school reforms in U.S. high schools and contemplates their future. It asks how cultural and instructional reforms differ across school reform types. Analyses focus on indicators of teacher and student culture as well as instructional reforms including project-based learning (PBL) and other inquiry-related practices. Findings are based on data from a national survey completed by 395 high school teachers who were responsible for and had used PBL in core academic subjects. Study participants taught in large, comprehensive high schools; in schools that had converted to small learning communities; and in newly created small school start-ups. Some of these small schools and conversions were based on a reform model, and others were not. Teachers in reform model schools reported the greatest number of cultural and instructional reforms, followed by teachers in other small schools. Reform models were particularly strong on instructional reforms and student culture. In general, start-up teachers reported more success implementing reforms than teachers in conversion schools, and teacher culture was reformed much more often than student culture and instruction. These findings help shed light on how widely practices and conditions have spread throughout the broader small schools movement, and which of these (including extensive PBL use) only seem to flourish in schools that subscribe to a holistic reform model. 相似文献
162.
Academic dishonesty among high school students has long since transformed into an epidemic that affects nearly every student, compromising not only their intellectual growth but also their moral development. Yet, beyond the occasional hand-wringing in the media, the problem has been largely ignored by teachers, schools, policymakers, and even character educators. To address this notable failure to respond, the authors developed and evaluated a character education program that sought to use the epidemic of academic dishonesty as an opportunity to reduce cheating and promote integrity. The present article describes the core components and central mechanisms of this schoolwide program as well as results from a 3-year mixed methods study of its implementation at 3 high schools in the Northeastern United States. These results and their implications are discussed in detail. The article also outlines suggestions for further program development and research. 相似文献
163.
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165.
In a previous article, we provided a review of the literature pertaining to the potential misdilagnosis of giftedness as ADHD, as well as a small‐scale study to illustrate this potential misdiagnosis. In this issue of Roeper Review, Mika provides several criticisms of that paper. In this article, we provide responses to her arguments by discussing the “symptoms” of giftedness; the relationship between ADHD, giftedness, and overexcitabilities; and the diagnosis of ADHD. 相似文献
166.
Jason L.G. Braasch Ivar BråtenHelge I. Strømsø Øistein AnmarkrudLeila E. Ferguson 《Contemporary educational psychology》2013
The current research examined whether instructional activities centering on contrasting cases promoted secondary school students’ evaluations of source features present in a multiple-documents inquiry context. Two hypothetical students’ document evaluation strategy protocols were designed: One featured more sophisticated strategies commonly enacted by experts and better college students and a second featured less sophisticated strategies commonly enacted by secondary school students. A series of classroom-based activities required that students compare/contrast the two protocols to decide which were the best strategies when analyzing multiple scientific documents and why. The findings demonstrated that students who previously participated in the intervention activities included more scientific concepts from more useful documents when generating essay responses from memory, displayed better rankings of the usefulness of the set of multiple documents, and offered more principled justifications based on source feature evaluations of trustworthiness compared to students who instead received typical classroom instruction. We discuss the instructional implications of a contrasting-cases approach in facilitating secondary school students’ usage of source features within multiple-documents inquiry contexts. 相似文献
167.
Many Web sites have begun allowing users to submit items to a collection and tag them with keywords. The folksonomies built from these tags are an interesting topic that has seen little empirical research. This study compared the search information retrieval (IR) performance of folksonomies from social bookmarking Web sites against search engines and subject directories. Thirty-four participants created 103 queries for various information needs. Results from each IR system were collected and participants judged relevance. Folksonomy search results overlapped with those from the other systems, and documents found by both search engines and folksonomies were significantly more likely to be judged relevant than those returned by any single IR system type. The search engines in the study had the highest precision and recall, but the folksonomies fared surprisingly well. Del.icio.us was statistically indistinguishable from the directories in many cases. Overall the directories were more precise than the folksonomies but they had similar recall scores. Better query handling may enhance folksonomy IR performance further. The folksonomies studied were promising, and may be able to improve Web search performance. 相似文献
168.
Jason S.-H. Tsai Chao-Lung Wei Shu-Mei Guo Leang S. Shieh Ce R. Liu 《Journal of The Franklin Institute》2008,345(5):508-535
An evolutionary programming-based adaptive observer is presented in this paper to improve the performance of state estimation of nonlinear time-varying sampled-data systems. Also, this paper presents a novel state-space adaptive tracker together with the proposed observer and estimation schemes for nonlinear time-varying sampled-data systems having actuator failures. For the class of slowly varying nonlinear time-varying systems, the proposed methodology is able to achieve the desired fault detection and performance recovery for the originally well-designed systems, as long as the controller having the high-gain property. For practical implementation, we utilize the advantages of digital redesign methodology to convert a well-designed high-gain analog controller/observer into its corresponding low-gain digital controller/observer. Illustrative examples are given to demonstrate the effectiveness of the proposed method. The developed digitally redesigned adaptive tracker with the proposed observer and estimator is suitable for implementation by using microprocessors. 相似文献
169.
Jason W. Patton 《Ethics and Information Technology》2000,2(3):181-187
While maintaining the importance of privacy for critical evaluations of surveillance technologies, I suggest that privacy also constrains the debate by framing analyses in terms of the individual. Public space provides a site for considering what is at stake with surveillance technologies besides privacy. After describing two accounts of privacy and one of public space, I argue that surveillance technologies simultaneously add an ambiguityand a specificity to public places that are detrimental to the social, cultural, and civic importance of these places. By making public places accessible to other places and/or times, surveillance technologies make these social contexts ambiguous by blurring their spatial and temporal bounds. At the same time, surveillancetechnologies valence public places in functionally specificways that are detrimental to informal civic life. To complement defensive approaches to surveillance technologies based onindividual privacy, I conclude by suggesting how sociality as a relational value or an ethics of place as a contextual value could provide a proactive line of reasoning for affirming the value ofthat which is between people and places. 相似文献
170.
Refining and Extending the Business Model With Information Technology: Dell Computer Corporation 总被引:7,自引:0,他引:7
The exceptional performance of Dell Computer in recent years illustrates an innovative response to a fundamental competitive factor in the personal computer industry - the value of time. This article shows how Dell's strategies of direct sales and build-to-order production have proven successful in minimizing inventory and bringing new products to market quickly, enabling it to increase market share and achieve high returns on investment. The Dell case illustrates how one business model may have inherent advantages under particular market conditions, but it also shows the importance of execution in exploiting those advantages. In particular, Dell's use of information technology (IT) has been vital to executing both elements of its business model - direct sales and build-to-order - and provides valuable insights into how IT can be applied to achieve speed and flexibility in an industry in which time is critical. Many of the insights gained from this case can be applied more generally to other time-dependent industries, suggesting that the findings from the Dell case will have implications for a growing number of companies and industries in the future. 相似文献