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In science education students should come to understand the nature and significance of models. A promising strategy to achieve this goal is using authentic modelling practices as contexts for meaningful learning of models and modelling. An authentic practice is defined as professionals working with common motives and purposes, pertaining to a similar type of procedure and applying relevant knowledge on the modelling issue they work on. In this study we evaluate whether the use of authentic practices initiates adequate students’ involvement. This was done by investigating students’ interests, ownership, familiarity and complexity. In addition, we evaluated students’ expressed modelling procedures in response to the modelling issues. We designed learning tasks which were enacted by a focus group of students. Three primary data sources were used to collect data. Firstly, a group discussion was organised in which students’ reflected on both authentic practices. Secondly, students filled in written questionnaires containing items on affective and cognitive aspects. Thirdly, the realised modelling procedures by students were analysed. The results show that students’ involvement was successfully initiated, evidenced by motivated students, willingness to continue and the completeness and quality of the realised modelling procedures. The design of the learning tasks proved to be successful in realising this involvement. The results obtained in this study support the strategy of using authentic modelling practices as contexts for meaningful learning of models and modelling.  相似文献   

3.
The role of writing in learning from analogies   总被引：1，自引：0，他引：1  
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4.
Interacting with and translating across multiple representations is an essential characteristic of expertise and representational fluency. In this study, we explored the effect of interacting with and translating between representations in a computer simulation or in a paper-based assignment on scientific accuracy of undergraduate science students’ explanations regarding the underlying mechanisms of action potential. The study proposed that a simulation designed with scaffolded inquiry and with multiple dynamically linked representations fosters students to use greater scientific accuracy in speaking about a complex scientific phenomenon as well as to work with this complex knowledge in higher cognitive domains. Student explanations were analysed for use of accurate scientific language as they worked with the instructional tool as well as under test conditions. We also investigated the cognitive domain that students worked within as they created explanations of the phenomenon under study. The proportion of elaborations that occurred in higher-level cognitive domains such as applying, analysing, evaluating and synthesising was used to denote representational fluency. The rationale for this approach is discussed. Findings suggest that the simulation prompted students towards operating in higher cognitive domains in order to construct new knowledge and therefore promoted representational fluency. It also suggests that translating between representations in a simulation in a collaborative social setting contributes towards students’ use of accurate scientific language. Students’ perceptions expressed during the interviews confirmed the findings.  相似文献   

5.
In this pilot research we examine the impact of two leadership development training programs on the ability of students to acquire knowledge, share knowledge, and apply knowledge for organizational decision making. One program emphasized concepts and case‐based application based on a technical learning paradigm. The other program used a game‐based computer simulation, Virtual Leader, grounded in an experiential or situated learning paradigm. After training, students from both programs engaged in a complex in‐basket exercise to examine the quality of their leadership and managerial abilities. In this exercise, participants from each training intervention worked with their trained cohort to accomplish a day of managerial work. Participants were observed and their individual and collective actions and decisions on behalf of the organization were evaluated. Using qualitative research we compared the organizational decisions associated with each group to determine which pedagogical technique resulted in the most effective application of student learning. While technical learning pedagogy was associated with greater information acquisition, the game‐based computer simulation (an experiential, social‐interaction oriented pedagogy) was associated with better decision quality and more shared cognition. Evidence suggests that students taught with the game‐based computer simulation collectively demonstrated a greater ability to apply what they learned.  相似文献   

6.
This study aims to characterize a group of students’ preliminary oral explanations of a scientific phenomenon produced as part of their learning process. The students were encouraged to use their own wordings to test out their own interpretation of observations when conducting practical activities. They presented their explanations orally in the whole class after having discussed and written down an explanation in a small group. The data consists of transcribed video recordings of the presented explanations, observation notes, and interviews. A genre perspective was used to characterize the students’ explanations together with analysis of the students use of scientific terms, gestures, and the language markers “sort of” and “like.” Based on the analysis we argue to separate between event-focused explanations, where the students describe how objects move, and object-focused explanations, where the students describe object properties and interactions. The first type uses observable events and few scientific terms, while the latter contains object properties and tentative use of scientific terms. Both types are accompanied by an extensive use of language markers and gestures. A third category, term-focused explanations, is used when the students only provide superficial explanations by expressing scientific terms. Here, the students’ use of language markers and gestures are low. The analyses shows how students’ explanations can be understood as tentative attempts to build on their current understanding and observations while trying to reach out for a deeper and scientific way of identifying observations and building explanations and new ways of talking.  相似文献   

7.
Science educators have called for using the learning progression approach to align curriculum, instruction, and assessment. In line with this trend, we conducted both assessments and teaching experiments with students from grades 4 to 12 (717 students participated in the pre-assessments and 682 students participated in the post-assessments). The goal of the study is to develop a learning progression framework that provides effective guidance for curriculum and instruction on carbon-transforming processes in socio-ecological systems. We conducted the study in three research cycles. We developed a matter-and-energy learning progression framework during the first two cycles. This learning progression framework was used to guide the teaching intervention in the third research cycle. Clinical interviews and written assessments were implemented before and after the teaching intervention. In the process of data analysis, we found that the matter-and-energy learning progression framework did not provide a fine-grained depiction of students' reasoning. Therefore, we developed the five-practice learning progression framework, and used it to re-analyze data. Results indicate that the teaching intervention has helped students to achieve significant learning gains, but it was not effective enough in helping students achieve the upper anchor of the learning progression framework—constructing sophisticated scientific explanations. The results also indicate that students tended to rely on coherent and consistent reasoning to construct explanations. Based on the findings, we provide instructional suggestions and discuss the implications for climate change education and learning progression research.  相似文献   

8.
This study used an interactive dynamic simulation of action potential to explore social practices of learning among first year undergraduate biology students. It aimed to create a learning environment that fosters knowledge building discourse through working with multiple concept-specific representations. Three hundred and eighty-nine students and twenty-four tutors from different tutorial classes in Queensland, Australia participated in the study. Students were randomly allocated to two experimental groups and a comparison group. In the experimental groups, pairs of students used the interactive simulation to explore action potential. Only one of the experimental groups received instruction that modelled the scientific and visual language conventions of the representations within the simulation. In the comparison group, small groups of students used a traditional paper-based activity. Students across all groups were audio recorded using a think-aloud protocol while completing the group activity. Individual learning gains in the experimental groups and the comparison group were similar. However, the experimental groups showed a significantly greater frequency of knowledge construction discourse that included explanatory answers, evaluations, interpretation, testing and synthesis compared to the comparison group, indicating a deeper understanding of action potential. Analysis of misconceptions on the post-test and tutors’ reflections revealed that the experimental group receiving instruction modelling the scientific and visual language conventions around the representations had a better grasp of the terminology associated with the concepts compared with the other groups. The findings suggest that instruction focussing on the language conventions of concept-specific representations fosters the development of disciplinary discourse by transforming students’ social practices of working with scientific knowledge.  相似文献   

9.
One well-known learning obstacle is that students rarely use the concepts in the way that scientists use them. Rather, students mix up closely related concepts and are inclined towards matter-based conceptualisations. Furthermore, some researchers have argued that certain difficulties are rooted in the student’s limited repertoire of causal schemes. These two aspects are conveniently represented in the recent proposal of the systemic view of concept learning. We applied this framework in our analyses of university students’ explanations of DC circuits and their use of concepts such as voltage, current and resistance. Our data consist of transcribed group interviews, which we analysed with content analysis. The results of our analysis are represented with directed graphs. Our results show that students had a rather refined ontological knowledge of the concepts. However, students relied on rather simple explanation models, but few students were able to modify their explanations during the interview. Based on the analysis, we identified three processes of change: model switch, model refinement and model elaboration. This emphasises the importance of relevant relational knowledge at a later stage of learning. This demonstrates how concept individuation and learning of relational structures occurs (and in which order) and sets forth interesting research questions for future research.  相似文献   

10.
Discovery learning is generally seen as a promising but demanding mode of learning that, in most cases, can only be successful if students are guided in the discovery process. The present article discusses a study on discovery learning with a computer simulation environment in the physics domain of collisions. In the learning environment, which is called Collision, students learned about collisions where two particles move in the same direction and interact via a conservative force in such a way that the total mechanical energy is conserved. In the experiment we conducted with Collision, we evaluated the effects of adding two different ways to guide students: model progression, in which the model is presented in separate parts; and assignments, small exercises that the student can choose to do. The effect of providing assignments and model progression was evaluated by comparing the learning behavior and learning results over three experimental conditions in which different versions of the simulation environment were presented: pure simulation, simulation plus assignments, and simulation plus model progression and assignments. Students' use of the environment was logged, their subjectively experienced workload was measured on‐line, and their learning was assessed using a number of assessment procedures. Providing assignments with the simulation improved students' performance on one aspect of a so‐called intuitive knowledge test. Providing the students with model progression did not have an effect. A subjective workload measure indicated that expanding the simulation with assignments and model progression did not raise the workload experienced by the students. © 1999 John Wiley & Sons, Inc. J Res Sci Teach 36: 597–615, 1999  相似文献   

11.
The purpose of this study was to construct and study the impact of a research‐based sequence for teaching the concept of modelling to seventh‐grade science students. We identified students' notions of models and the aspects of school science to be addressed regarding the model concept, which were then taken into account when we planned the learning sequence. The idea of modelling in science was taught while the students were learning about the change of states of matter in seventh‐grade physics. A pre‐interview revealed that the students' notions of models were very limited, while a post‐interview showed that this improved in the course of the series of lessons. There was also a statistically significant difference in the students' understanding of modelling between our target group and a control group consisting of ninth‐grade students who had received only the normal teaching. However, a delayed post‐questionnaire completed a few months after the teaching sequence showed that the stability of learning results were dependent on whether models and modelling were used in the normal teaching conducted after the teaching sequence. Implications for teaching, teacher education and research are also addressed in this paper.  相似文献   

12.
In this paper, we investigate an approach to supporting students’ learning in science through a combination of physical experimentation and virtual modeling. We present a study that utilizes a scientific inquiry framework, which we call “bifocal modeling,” to link student-designed experiments and computer models in real time. In this study, a group of high school students designed computer models of bacterial growth with reference to a simultaneous physical experiment they were conducting, and were able to validate the correctness of their model against the results of their experiment. Our findings suggest that as the students compared their virtual models with physical experiments, they encountered “discrepant events” that contradicted their existing conceptions and elicited a state of cognitive disequilibrium. This experience of conflict encouraged students to further examine their ideas and to seek more accurate explanations of the observed natural phenomena, improving the design of their computer models.  相似文献   

13.
Problem-solving has been one of the major strands in science education research. But much of the problem-solving research has been conducted on discipline-based contexts; little research has been done on how students, especially individuals, solve interdisciplinary problems. To understand how individuals reason about interdisciplinary problems, we conducted an interview study with 16 graduate students coming from a variety of disciplinary backgrounds. During the interviews, we asked participants to solve two interdisciplinary science problems on the topic of osmosis. We investigated participants’ problem reasoning processes and probed in their attitudes toward general interdisciplinary approach and specific interdisciplinary problems. Through a careful inductive content analysis of their responses, we studied how disciplinary, cognitive, and affective factors influenced their interdisciplinary problems-solving. We found that participants’ prior discipline-based science learning experiences had both positive and negative influences on their interdisciplinary problem-solving. These influences were embodied in their conceptualization of the interdisciplinary problems, the strategies they used to integrate different disciplinary knowledge, and the attitudes they had toward interdisciplinary approach in general and specific interdisciplinary problems. This study sheds light on interdisciplinary science education by revealing the complex relationship between disciplinary learning and interdisciplinary problem-solving.  相似文献   

14.
Although instructional explanations are commonly used to introduce learners to new learning content, previous studies have often shown that their effects on learning outcomes are minimal. This failure might partly be due to mental passivity of the learners while processing introductory explanations and to a lack of opportunity to revise potential misunderstandings after working on introductory explanations. Against this background, we provided learners with two instructional support measures to optimise the introduction of new principles and concepts by providing instructional explanations in the domain of management theory: (a) prompts designed to induce inferences that are focused on the central content of the explanations, and (b) remedial explanations that are adapted to the learners’ knowledge gaps. We tested their effects in a 2 × 2 factorial experimental design with the following factors: (a) prompts designed to induce focused processing (with vs. without), and (b) remedial explanations (adapted vs. random). The participants consisted of 80 psychology students. We found that the prompts fostered both the share of deep-oriented processing and the acquisition of conceptual knowledge. The beneficial effect of prompts on conceptual knowledge was mediated by the number of inferences that learners generated in response to the prompts. In addition, we found that prompts also fostered the instructional efficiency of providing instructional explanations. The provision of adapted remedial explanations, however, fostered neither deep-oriented processing nor the acquisition of conceptual knowledge. We conclude that prompts designed to induce focused processing can foster deep-oriented processing as well as both the effectiveness and efficiency of learning from instructional explanations.  相似文献   

15.

In a science methods course for elementary education majors, students investigated the phases of the moon for six weeks. The moon investigation emphasized that scientific knowledge: a) is empirically based; b) involves the invention of explanations; and c) is socially embedded. After the moon investigation, students realized that scientists make observations and generate patterns, but failed to recognize that observation could precede or follow theory building. Students could separate the processes of observing from creating explanations in their learning, but did not articulate the role of invention in science. Similarly, students valued the social dimensions of learning, but were unable to apply them to the activity of scientists. Although our teaching was explicit about students' science learning, we did not help them make direct connections between their science learning activities and the nature of science [NOS]. We provide a set of recommendations for making the NOS more explicit in the moon investigation.  相似文献   

16.
Collaborative peer learning environments have received increasing attention in classrooms due to the potential for improving learning and achievement. Yet previous research shows that not all students benefit from the collaborative experience. This paper explores the nature of helping behavior within peer-directed small groups that may be most effective for learning, especially for students who have difficulty with the material. Drawing on examples from recent research on student learning in collaborative mathematics classrooms in a US middle school, we identify student behaviors that are necessary for effective help seeking and help giving, as well as responsibilities of teachers in establishing classroom conditions that bring about effective helping behavior. The findings show that effective help seekers ask precise questions, persist in seeking help, and apply the explanations received; effective help givers provide detailed explanations of the material as well as opportunities for help recipients to apply the help received, and monitor student understanding. These critical helping behaviors reflect the constructivist views embodied in Piagetian and Vygotskian perspectives on learning in social contexts.  相似文献   

17.
Explanations are used as indicators of understanding in mathematics, and conceptual explanations are often taken to signal deeper understanding of a domain than more superficial explanations. However, students who are able to produce a conceptual explanation in one problem or context may not be able to extend that understanding more generally. In this study we challenge the notion that conceptual explanations indicate general understanding by showing that – although conceptual explanations are strongly associated with correct answers – they are not employed equally across different contexts, and the highest performing students tend to use more general explanations, which may or may not be conceptual. Overall, our results suggest that explanations of fraction magnitudes follow a learning trajectory reflected in students’ accuracy and explanations: weak students focus on concrete, non-conceptual features, stronger students use concepts to explain their answers, and the highest performers tend to use general (but not necessarily conceptual) rules.  相似文献   

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Our everyday life is influenced by an overproduction of images and by an iconogenic surplus that is connected to the proliferation of media. These contribute to both the quality and quantity of communication, but simultaneously amplify the knowledge gap between an audience that is able to critically process messages and another that is affected uncritically by prejudices and stereotypes. Bellino argues for a critical media education to address this gap by encouraging the development of students' critical thinking and social awareness. In this article we will discuss the results of a research‐driven design project in which visual communication design students engaged with theories of cultural stereotypes and critiqued the role of media in their perpetuation. We adopted Kolb's model of experiential learning as recent published research demonstrates that art and design students have difficulties in conventional academic approaches to learning theory. In this regard students learned theories of stereotype through doing and making and embodied this learning in their critical project outcomes.  相似文献   

20.
Understanding the particulate nature of matter (PNM) is vital for participating in many areas of science. We assessed 11 students’ atomic/molecular‐level explanations of real‐world phenomena after their participation in a modelling‐based PNM unit. All 11 students offered a scientifically acceptable model regarding atomic/molecular behaviour in non‐heated solids. Yet, 10 of 11 students expressed the view that, in response to added heat energy, atoms/molecules in a solid increase in movement to a degree beyond what is scientifically accepted. These students attributed a gas‐like model of atomic/molecular movement to situations involving a heated solid. Of the students who held two conflicting models of atomic/molecular movement in solids, almost all provided justification for doing so, indicating their holding of the conflicting models was unproblematic. These findings can be interpreted to mean that students may drop constraints of certain scientific representations and apply, assess, or revise models when explaining unfamiliar phenomena. In fact, we believe students may develop conflicting causal models as a result of misperceptions they acquire, in part, during classroom instruction regarding atomic/molecular movement. However, our findings may also be interpreted as an incidence of student model development that may later aid their understanding of a more complex model, one that involves substantial sub‐atomic electron movement to account for heat transfer in solids. Whether or not this is the case remains to be seen. Implications for student learning and instruction are discussed.  相似文献   

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