Students' reasoning about chemical bonding: The lacuna of repulsion     

Asnat R. Zohar  Sharona T. Levy 《科学教学研究杂志》2019,56(7):881-904

This article concerns a lacuna in chemistry students' reasoning about chemical bonding. Although chemistry students are familiar with the charges that make up the atom––both positive and negative––they refer only to the attraction between unlike charges. Specifically, they ignore the repulsion between the positive nuclei. We named this disregard of repulsion the lacuna of repulsion. Repulsion is a crucial component in the force-based explanation of chemical bonding, presenting the bond as a dynamic equilibrium between attraction and repulsion electrical forces. We noticed this lacuna incidentally while interviewing chemistry students for a bigger project aimed at supporting students in understanding the force-based explanation of chemical bonding. This article describes our systematic qualitative study of the lacuna of repulsion and its impact on mental models of 23 high school chemistry students. Our findings show that students use six mental models, most of them built upon each other. Beginning from a simple mental model that describes the chemical bond as electrons, continuing with the including attraction forces, and completing with repulsion and a dynamic view of the bond. Only when one considers both attraction and repulsion forces and understands the dynamic balance between them is it possible to build the force-based dynamic mental model of chemical bonding.  相似文献   

The osmium lamps     

Louis E. Levy  Samuel Sartain 《Journal of The Franklin Institute》1905,159(6):461-463

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Report of the committee on publications     

Louis E. Levy 《Journal of The Franklin Institute》1910,169(2):154-155

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Does STES‐Oriented Science Education Promote 10th‐Grade Students’ Decision‐Making Capability?     

Tami Levy Nahum  David Ben‐Chaim  Ibtesam Azaiza  Orit Herskovitz 《International Journal of Science Education》2013,35(10):1315-1336

Today’s society is continuously coping with sustainability‐related complex issues in the Science‐Technology‐Environment‐Society (STES) interfaces. In those contexts, the need and relevance of the development of students’ higher‐order cognitive skills (HOCS) such as question‐asking, critical‐thinking, problem‐solving and decision‐making capabilities within science teaching have been argued by several science educators for decades. Three main objectives guided this study: (1) to establish “base lines” for HOCS capabilities of 10th grade students (n = 264) in the Israeli educational system; (2) to delineate within this population, two different groups with respect to their decision‐making capability, science‐oriented (n = 142) and non‐science (n = 122) students, Groups A and B, respectively; and (3) to assess the pre‐post development/change of students’ decision‐making capabilities via STES‐oriented HOCS‐promoting curricular modules entitled Science, Technology and Environment in Modern Society (STEMS). A specially developed and validated decision‐making questionnaire was used for obtaining a research‐based response to the guiding research questions. Our findings suggest that a long‐term persistent application of purposed decision‐making, promoting teaching strategies, is needed in order to succeed in affecting, positively, high‐school students’ decision‐making ability. The need for science teachers’ involvement in the development of their students’ HOCS capabilities is thus apparent.  相似文献   

Developmental assessment of the school-aged child with developmental disabilities     

Benjamin Levy 《Educational Psychology in Practice》2013,29(1):102-103

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Internationalised Reform: Overlapping Agendas in East Asian and Latin American Higher Education     

Levy  Daniel C. 《Minerva》1998,36(4):367-379

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Film scenes in interdisciplinary education: teaching the Internet of Things*     

Young-mee Hwang  Kwang-sun Kim  Tami Im 《Educational Media International》2017,54(2):83-98

The Internet of Things (IoT) is gaining importance in education owing to its rapid development. This study addresses the importance of interdisciplinary education between technology and the humanities. The use of films as a teaching resource is suitable for interdisciplinary education because films represent creative forecasts and predictions on future human society, helping the public realize what could occur in the future. By utilizing films in instruction, students can be trained to understand the three key functions of IoT and acquire the ability to develop creative applications of IoT. An IoT teaching model using the films Minority Report (2002), Big Hero 6 (2014), Iron Man 3 (2013), Her (2013), and Transcendence (2014), all of which depict various applications of IoT that could be helpful in the teaching of the functions and concepts of IoT, is suggested; an interdisciplinary class is carried out for 15 weeks following the model. The effectiveness of the class is measured using quantitative analysis, qualitative analysis, and reflection journals. The findings show that students developed interdisciplinary capacity through education using films.  相似文献   

“I’m a Library Hugger!”: Public Libraries as Valued Community Assets     

Tami Oliphant 《Public Library Quarterly》2014,33(4):348-361

Public library value is often ascertained by outlining the economic, social, and cultural benefits public libraries generate for the greater community. While researchers have focused on the concepts of social capital, civic engagement, and the role of libraries in promoting democracy, fewer studies have explored the public’s perceptions of libraries in an effort to determine library value. Furthermore, library nonusers are rarely included in these studies. In Alberta, Canada, 1,201 Albertans from across the province, including both urban and rural areas, were asked a series of questions about their perceptions of public libraries and library use. Findings reveal characteristics of library users and nonusers, what services and resources are used most often at public libraries, what value the public places on public libraries, and the role that libraries play in supporting communities.  相似文献   

Validation evidence for the Netherlands physical activity questionnaire for young children: the Iowa bone development study     

Janz KF  Broffitt B  Levy SM 《Research quarterly for exercise and sport》2005,76(3):363-369

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Traversing the Divide Between High School Science Students and Sophisticated Nature of Science Understandings: A Multi-pronged Approach     

Tami Russell  Mehmet Aydeniz 《Journal of Science Education and Technology》2013,22(4):529-547

This study investigated the effects of a multi-pronged approach of increasing the nature of science (NOS) understandings of high school science students. The participants consist of 63 high school students: 31 in the intervention group and 32 in the control group. Explicit/reflective NOS instruction was imbedded within authentic inquiry experiences and supported by online discussions. The students in the intervention group were prompted to engage in various discussions focusing on essential tenets of NOS in an online environment that assured student confidentiality. NOS views were assessed through multiple data sources including pre- and post-intervention questionnaires as well as students’ responses to online discussion prompts. Results show that the instructional intervention used in this study which combined explicit/reflective NOS instruction with intense inquiry exposure along with ample reflective opportunities in an anonymous online discussion format led to positive learning gains in participants’ understanding the NOS aspects assessed. Implications for enhancing data collection with high school students and for promising professional development opportunities for science educators are discussed.  相似文献