When and Why Are the Values of Physical Quantities Expressed with Uncertainties? A Case Study of a Physics Undergraduate Laboratory Course

The understanding of measurement is related to the understanding of the nature of science—one of the main goals of current international science teaching at all levels of education. This case study explores how a first-year university physics course deals with measurement uncertainties in the light of an epistemological analysis of measurement. The data consist of the course documents, interviews with senior instructors, and laboratory instructors’ responses to an online questionnaire. During laboratory work, uncertainties are expressed in the large majority of the measurements made by the students but only in less than half of their calculation results. The instructors’ expectations are that students systematically estimate uncertainties so that they become aware that measurements and calculations are never exact. However, since uncertainties are not specified for the values given in the laboratory guides, uncertainties are often missing from the results of students’ calculations. The potential side effects of students’ measurement understanding are discussed and suggestions for improvements are proposed.     

Constructivism in Practice: an Exploratory Study of Teaching Patterns and Student Motivation in Physics Classrooms in Finland,Germany and Switzerland

For the last three decades, moderate constructivism has become an increasingly prominent perspective in science education. Researchers have defined characteristics of constructivist-oriented science classrooms, but the implementation of such science teaching in daily classroom practice seems difficult. Against this background, we conducted a sub-study within the tri-national research project Quality of Instruction in Physics (QuIP) analysing 60 videotaped physics classes involving a large sample of students (N?=?1192) from Finland, Germany and Switzerland in order to investigate the kinds of constructivist components and teaching patterns that can be found in regular classrooms without any intervention. We applied a newly developed coding scheme to capture constructivist facets of science teaching and conducted principal component and cluster analyses to explore which components and patterns were most prominent in the classes observed. Two underlying components were found, resulting in two scales—Structured Knowledge Acquisition and Fostering Autonomy—which describe key aspects of constructivist teaching. Only the first scale was rather well established in the lessons investigated. Classes were clustered based on these scales. The analysis of the different clusters suggested that teaching physics in a structured way combined with fostering students’ autonomy contributes to students’ motivation. However, our regression models indicated that content knowledge is a more important predictor for students’ motivation, and there was no homogeneous pattern for all gender- and country-specific subgroups investigated. The results are discussed in light of recent discussions on the feasibility of constructivism in practice.     

Imagery,intuition and imagination in quantum physics education

In response to the authors, I demonstrate how threshold concepts offer a means to both contextualise teaching and learning of quantum physics and help transform students into the culture of physics, and as a way to identify particularly troublesome concepts within quantum physics. By drawing parallels from my own doctoral research in another area of contemporary physics—special relativity—I highlight concepts that require an ontological change, namely a shift beyond the reality of everyday Newtonian experience such as time dilation and length contraction, as being troublesome concepts that can present barriers to learning with students often asking “is it real?”. Similarly, the domain of quantum physics requires students to move beyond “common sense” perception as it brings into sharp focus the difference between what is experienced via the sense perceptions and the mental abstraction of phenomena. And it’s this issue that highlights the important role imagery and creativity have both in quantum physics and in the evolution of physics more generally, and lies in stark contrast to the apparent mathematical focus and lack of opportunity for students to explore ontological issues evident in the authors’ research. By reflecting on the authors’ observations of a focus on mathematical formalisms and problem solving at the expense of alternative approaches, I explore the dialectic between Heisenberg’s highly mathematical approach and Schrödinger’s mechanical wave view of the atom, together with its conceptual imagery, at the heart of the evolution of quantum mechanics. In turn, I highlight the significance of imagery, imagination and intuition in quantum physics, together with the importance of adopting an epistemological pluralism—multiple ways of knowing and thinking—in physics education. Again drawing parallels with the authors’ work and my own, I identify the role thought experiments have in both quantum physics education and in physics more generally. By introducing the notion of play, I advocate adopting and celebrating multiple approaches of teaching and learning, including thought experiments, play, dialogue and a more conceptual approach inclusive of multiple forms of representation, that complements the current instructional, mathematical approach so as to provide better balance to learning, teaching and the curriculum.     

物理教学中学生发散思维之变通能力的培养

现代科学教育的根本是对被教育者创新精神、创造性思维能力的培养,也是全面实施素质教育的重要内容之一.文章就物理中“动”和“静”的问题,对学生发散思维的变通性能力的培养进行了探讨.     

浅谈如何在物理教学中渗透STS教育

根据新课程标准的要求,中学物理的教学要加强与科学、技术、社会的联系,将学生培养成为关心社会和适应社会生活的人。为此,开展STS教育能够培养学生的科学、技术、社会意识,能最大限度地发挥学生的主观能动性,使学生充分观察、接触和了解社会。本文将结合物理教学的实际,对如何渗透STS教育进行一些简单的探讨。     

Promoting Conceptual Development in Physics Teacher Education: Cognitive-Historical Reconstruction of Electromagnetic Induction Law

In teaching physics, the history of physics offers fruitful starting points for designing instruction. I introduce here an approach that uses historical cognitive processes to enhance the conceptual development of pre-service physics teachers’ knowledge. It applies a method called cognitive-historical approach, introduced to the cognitive sciences by Nersessian (Cognitive Models of Science. University of Minnesota Press, Minneapolis, pp. 3–45, 1992). The approach combines the analyses of actual scientific practices in the history of science with the analytical tools and theories of contemporary cognitive sciences in order to produce knowledge of how conceptual structures are constructed and changed in science. Hence, the cognitive-historical analysis indirectly produces knowledge about the human cognition. Here, a way to use the cognitive-historical approach for didactical purposes is introduced. In this application, the cognitive processes in the history of physics are combined with current physics knowledge in order to create a cognitive-historical reconstruction of a certain quantity or law for the needs of physics teacher education. A principal aim of developing the approach has been that pre-service physics teachers must know how the physical concepts and laws are or can be formed and justified. As a practical example of the developed approach, a cognitive-historical reconstruction of the electromagnetic induction law was produced. For evaluating the uses of the cognitive-historical reconstruction, a teaching sequence for pre-service physics teachers was conducted. The initial and final reports of twenty-four students were analyzed through a qualitative categorization of students’ justifications of knowledge. The results show a conceptual development in the students’ explanations and justifications of how the electromagnetic induction law can be formed.     

Whole Class Dialogic Discussion Meets Taiwan’s Physics Teachers: Attitudes and Culture

There is a distance between the power that whole class dialogic discussions (WCDD) may offer to the science class and their use in practice. Teachers’ attitudes toward WCDD are part of the problem. The aims of this study were twofold: (a) to examine Taiwanese physics teachers’ attitudes toward WCDD by considering cultural perspectives and describe how these attitudes changed as a result of a special workshop designed for this purpose, and (b) to report on how these attitudes should be taken into account in designing such workshops in the future. Nine experienced physics teachers participated in the WCDD workshop. The workshop was based on the WCDD model developed by Eshach (2010). Inductive analyses were performed on interviews with the teachers and their students, which were composed of 36 questions and developed specially for the purpose of this study, yielded the following categories: (1) In-school reasons for opposing WCDD—reasons belonging to school ways/tradition of teaching that may cause barriers to WCDD implementation; (2) External Factors—cultural reasons relating to Taiwanese views concerning education in general, which cause barriers to WCDD implementation; and (3) Cognitive aspect—refers to what teachers know about WCDD. The paper concludes with a discussion on what should be done in order to successfully bring WCDD to the Taiwanese physics class.     

“大学物理实验”课程教学改革策略探索

"大学物理实验"是面向理工科学院学生开授的通识必修基础课,该课程要求学生在学习了大学物理的基本知识后,能够借助物理实验室提供的实验仪器,通过自己动手操作,完成相应的物理实验项目,加深对物理理论的理解和融会贯通,同时增强学生的实践能力,对学生后续的专业实验和实践起到承前启后的引导作用。大学物理实验教学改革是本科教学发展的需求,重视学生独立自主学习、开拓创新,以学生为中心进行教育教学。学校"大学物理实验"教学改革中融入了课程思政,加入了虚拟仿真实验,实现了线上线下混合式的教学模式,做到推陈出新、虚实结合。     

重视学生实验操作能力培养学生做小实验

物理是一门基础科学,是整个自然科学和现代技术发展的基础,怎样在物理教学中才能贯彻实施素质教育,这是当前化学教师都在认真思考的问题.教师不仅要传授化学实验知识,技能,更要重视开发学生的智力.若对学生的智力开发认识不足或方法不佳,则必然要影响学生的智力开发,影响教学质量的提高.     

Tension Between Visions of Science Education

The aim of this study is to contribute to an understanding of how curricular change is accomplished in practice, including the positions and conflicts of key stakeholders and participants, and their actions in the process. As a case, we study the treatment of energy in Swedish secondary curricula in the period 1962–2011 and, in particular, how the notion of energy quality was introduced in the curricula in an energy course at upper secondary school in 1983 and in physics at lower secondary school in 1994. In the analysis, we use Roberts’ two competing visions of science education, Vision I in which school science subjects largely mirror their corresponding academic disciplines and Vision II that incorporates societal matters of science. In addition, a newly suggested Vision III represents a critical perspective on science education. Our analysis shows how Vision II and III aspects of science education have gained importance in curricula since the 1980s, but in competition with Vision I considerations. Energy quality played a central role in providing Vision II and III arguments in the curricular debate on energy teaching. Subsequent educational research has found that Swedish teachers and students struggle with how to relate to energy quality in physics teaching, which we explain as partly due to the tension between the competing visions.     

“物理美学”初探

“物理美学”或者称“物理学中的美学”是一门研究物理学美的规律的科学。物理美有多种表现,在教学中贯穿美感教育有利于激发学生的求知兴趣,培养学生的创造性思维。     

Students’ Expectations of Teaching in Undergraduate Physics

This article reports on a phenomenographic‐based study of the expectations of teaching among undergraduate physics students. Data are drawn from a range of course‐contexts at each of two quite different universities — one South African and one Swedish — and five qualitatively different expectations of physics teaching are identified and exemplified. These range from presenting knowledge to facilitating personal development and agency. Implications of possible mismatches between students’ and lecturers’ expectations of physics teaching are discussed in relation to students’ learning experiences.     

Student Agency: an Analysis of Students’ Networked Relations Across the Informal and Formal Learning Domains

Agency is a construct facilitating our examination of when and how young people extend their own learning across contexts. However, little is known about the role played by adolescent learners’ sense of agency. This paper reports two cases of students’ agentively employing and developing science literacy practices—one in Singapore and the other in the USA. The paper illustrates how these two adolescent learners in different ways creatively accessed, navigated and integrated in-school and out-of-school discourses to support and nurture their learning of physics. Data were gleaned from students’ work and interviews with students participating in a physics curricular programme in which they made linkages between their chosen out-of-school texts and several physics concepts learnt in school. The students’ agentive moves were identified by means of situational mapping, which involved a relational analysis of the students’ chosen artefacts and discourses across time and space. This relational analysis enabled us to address questions of student agency—how it can be effected, realised, construed and examined. It highlights possible ways to intervene in these networked relations to facilitate adolescents’ agentive moves in their learning endeavours.     

关于在高中物理课堂教学中融入科学素养的培养的思考

我国新一轮基础教育改革的一个非常重要的目标就是要培养高中生的科学精神,从而保证科学教育能够凌驾于公式与符号之上,提升高中生的科学素养。但是,在现阶段,在高中物理课堂教学中很少融入科学素养的培养,这不利于高中高中生的科学潜力的挖掘。基于此,本文结合具体的课堂教学情况,进行了关于在高中物理课堂教学中融入科学素养的培养的思考,提出了一些方法,希望能够有利于培养高中生的科学素养。     

Characterising Learning Interactions: A Study of University Students Solving Physics Problems in Groups

The purpose of this article is to explore how a group of four university physics students addressed mechanics problems, in terms of student direction of attention, problem solving strategies and their establishment of and ways of interacting. Adapted from positioning theory, the concepts ‘positioning’ and ‘storyline’ are used to describe and to analyse student interaction. Focused on how the students position the physics problems, themselves, and each other, the analyses produced five different storylines. The dominant storyline deals with how the students handled the problem solving, whilst two other storylines characterise alternative ways of handling the physics problems, whereas the two remaining storylines are concerned with how students positioned themselves and others—as either funny and/or knowledgeable physics students—and constitute different aspects of the physics community. Finally, the storylines are discussed in relation to the pedagogical situation, with recommendations made for teaching practice and future research.     

History and philosophy of science in physics education

Physics education in the Danish upper secondary school system has undergone a major reform, starting in August 1988. The earlier science‐centred physics curriculum has given way to a presentation of physics as a human activity, one way of obtaining this aim being through a compulsory introduction to elements of the history and philosophy of science. Following a brief presentation of the main reasons for including the historical‐philosophical dimension in physics teaching, this article describes how this dimension‐‐which was unfamiliar to most physics teachers‐‐was implemented in daily teaching practice. The implementation took place in three steps: (1) the development of a comprehensive teachers’ guide, (2) a nationwide in‐service teacher training programme, and (3) the publication of a number of students’ books written according to the guidelines of the committee responsible for all aspects of the implementation programme.     

大学物理分层次教学的探索与实践

文章分析了大学物理分层次教学的主要思想,研究了按照专业集中授课模式条件下如何更好地满足不同专业学生对物理学的不同层次的学习需求,探索出了在中国现实教育环境下实施分层次教学的一种有效方法--四步教学法。经实践检验证实了该方法能更好地激发学生的学习兴趣,以及更加注重知识应用和技能培养。     

Learning science by doing science: an authentic science process-learning model in postsecondary education

Research on understanding the full extent that an authentic science research experience engages students in how scientists think and act is sparse. ‘Learning-science-by-doing-science’ (LSDS) is an emerging self-guided process-learning model in postsecondary science education. It offers authentic science research opportunities that drive students to think and act like scientists. This study investigates the LSDS approach as a potential model for science learning at postsecondary level and aims to answer a main research inquiry – what are the students’ and teaching staff’s perceptions of students’ learning gains and the quality of their learning experiences in an authentic research environment within the LSDS model? To answer this question, data were collected from the students, alumni, instructors, teaching assistants and the program director via questionnaires, focus groups and interviews. Students’ and staff’s lived experiences and their perceptions on their authentic research experiences within the LSDS model were used to articulate the key attributes and stages of the LSDS model. The outcomes of this study can be used to help other science programs implement similar authentic research process learning approaches in their own contexts.     

In the physics class: university physics students’ enactment of class and gender in the context of laboratory work

This article explores how the doing of social class and gender can intersect with the learning of science, through case studies of two male, working-class university students’ constitutions of identities as physics students. In doing so, I challenge the taken-for-granted notion that male physics students have an unproblematic relation to their chosen discipline, and nuance the picture of how working-class students relate to higher education by the explicit focus on one disciplinary culture. Working from the perspective of situated learning theory, the interviews with the two male students were analysed for how they negotiated the practice of the physics student laboratory and their own classed and gendered participation in this practice. By drawing on the heterogeneity of the practice of physics the two students were able to use the practical and technological aspects of physics as a gateway into the discipline. However, this is not to say that their participation in physics was completely frictionless. The students were both engaged in a continuous negotiation of how skills they had learned to value in the background may or may not be compatible with the ones they perceived to be valued in the university physicist community.