Homework (HW) is an integral part of the learning process. Currently, there is renewed interest and controversy about its effectiveness. The present study explores the voices of the science teachers on this matter. Adopting the view that reporting both teachers’ views and actual classroom practices is necessary for obtaining a more complete view of the phenomena, the present study addressed teachers’ views relating to the cognitive, affective, and pedagogical aspects of HW, their in-class practices and behaviors related to HW, and if the views and practices differ. The research was conducted in 3 stages: (a) teachers’ (n = 25) behaviors were examined based on classroom observations of 3 – 5 consecutive lessons, (b) these teachers were interviewed about their beliefs about and attitudes toward HW, and (c) the data from both the observations and interviews were processed into categories and subcategories. The findings revealed a wide range of teachers’ beliefs, attitudes, and behaviors and that teachers hold both positive and negative views simultaneously. In addition, the views for some categories expressed in the interviews concurred with the teacher’s actual classroom behavior; for other categories, disagreements were identified. This research broadens the contemporary horizons regarding HW and may contribute to those who wish to work with teachers making HW more effective.
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The International Network Structure of News Media: An Analysis of Hyperlinks Usage in News Web sites
Itai Himelboim Ph.D. 《广播与电子媒介杂志》2013,57(3):373-390
This study takes a network approach to examining international communication. Building upon the world system theory and the preferential attachment network theorem, the structure of the international network created by news media is examined. The use of external hyperlinks in 6,298 foreign sries in 20 languages from 223 news Web sites in 73 countries was examined. Findings revealed that information continues to flow from a handful of countries to the rest of the world. News media preferred linking to established information sources, typically in core counties. This study concludes that news media use new technology to replicate old practices. 相似文献
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ABSTRACTAdvances in information technology and communication through new social media platforms have enormous benefits in many contexts, including education. At the same time, self-distractive use of technology – or ‘absent presenteeism’ – can have negative effects in the classroom. The main research question of this study is the relationship between organisational leadership, enforcement of discipline and self-distractive use of technology in the secondary school setting. The finding indicated that the permissive style of discipline appeared to be the most effective at reducing self-distractive mobile phone use. However, a more authoritative style of discipline, short teacher tenure and the principal’s transformational leadership style contributed to high self-distractive mobile phone use. The authors rely on empirical data collected in Israeli public high schools from two independent sources: 144 teachers and 591 students, which yielded 4440 teacher-student events. Implications of the findings are discussed in the context of the school setting characterised by rapid changes in technology. 相似文献
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This paper deals with the problem of tunneling effects on existing buildings. The direct solution, using the condensation method, is presented. This method allows the structural and geotechnical engineers to treat the problem separately and then assemble a relatively small matrix that can be solved directly, even within a spreadsheet. There are certain concerns that the resultant matrix may be ill-conditioned when the structure is very stiff. This paper suggests an alternative method that essentially relaxes the system from an infinitely rigid structure solution. As such, it does not encounter the problems associated with stiff systems. The two methods are evaluated for an example problem of tunneling below a framed structure. It is found that while the direct method may fail to predict reasonable values when the structure is extremely rigid, the alternative method is stable. The relaxation method can therefore be used in cases where there are concerns about the reliability of a direct solution. 相似文献
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Kukliansky Ida Shosberger Itai Eshach Haim 《International Journal of Science and Mathematics Education》2014,14(1):229-250
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Itai Himelboim Ruthann Weaver Lariscy Spencer F. Tinkham Kaye D. Sweetser 《广播与电子媒介杂志》2013,57(1):92-115
This study examines relationships among interpersonal informational trust and openness with Internet-based political activities and attitudes. Conceptually, it proposes the categorization of online spaces and activities as consumption or interaction types, and classifies interpersonal informational trust within inner and outer circles. Interpersonal informational trust was found to be positively associated with perception of online activities as political participation. It also was associated with use of all types of online media for purposes of political communication, but mostly with online spaces that require interaction with others. Interpersonal political openness showed positive association with the use of interactive-type Web sites for purposes of political communication. 相似文献
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Journalists and media organizations are often criticized by politicians, the public, and media scholars for not fulfilling their role in society. This study analyzed 242 codes of ethics in 94 countries to identify journalistic social role as perceived by media organizations. It identified and compared journalistic social roles toward society and toward loci of power, based on each country's geopolitical characteristics and type of media organization. Findings indicated a rather consensual perception of journalistic role around the world and across media organizations: neutral, detached from society and defensive—but not adversary—toward the loci of power. Findings also highlighted the control media organizations have in shaping these roles. 相似文献
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