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1.
This is the final paper in a five-paper series describing our national study of the teaching and learning of cosmology in general education astronomy college-level courses. A significant portion of this work was dedicated to the development of five new Lecture-Tutorials that focus on addressing the conceptual and reasoning difficulties that our research shows students have with frequently taught cosmology topics, such as the expansion of the universe, the Big Bang, and dark matter. We conducted a systematic investigation of the implementation of these new Lecture-Tutorials and resulting learning gains in order to test the efficacy of these new Lecture-Tutorials. Our investigation included classroom observations, results from pre–post testing using four conceptual cosmology surveys, and comparisons between classes in terms of the class time spent on cosmology topics and other instructional strategies used to teach cosmology. We used this combination of qualitative and quantitative research results to evaluate the conceptual understandings of students who used the new cosmology Lecture-Tutorials compared to those students who did not. The analysis of our data shows that, in many cases, classrooms that used the cosmology Lecture-Tutorials saw a greater increase in their students’ conceptual cosmology knowledge compared to classrooms that did not use the cosmology Lecture-Tutorials. However, our results also indicate how instructors implement the Lecture-Tutorials into their classrooms strongly influences their students’ learning gains.  相似文献   

2.
The importance of biotechnology education at the high-school level has been recognized in a number of international curriculum frameworks around the world. One of the most problematic issues in learning biotechnology has been found to be the biotechnological methods involved. Here, we examine the unique contribution of an animation of the polymerase chain reaction (PCR) in promoting conceptual learning of the biotechnological method among 12th-grade biology majors. All of the students learned about the PCR using still images (n = 83) or the animation (n = 90). A significant advantage to the animation treatment was identified following learning. Students’ prior content knowledge was found to be an important factor for students who learned PCR using still images, serving as an obstacle to learning the PCR method in the case of low prior knowledge. Through analysing students’ discourse, using the framework of the conceptual status analysis, we found that students who learned about PCR using still images faced difficulties in understanding some mechanistic aspects of the method. On the other hand, using the animation gave the students an advantage in understanding those aspects.  相似文献   

3.
A crucial issue for prospective teachers (PTs) in their education is to develop pedagogical content knowledge (PCK; i.e. how to make a topic comprehensible to pupils). However, research has shown that PTs may have tacit ideas about teaching that act as filters preventing consideration of unfamiliar and discrepant ideas. These ideas must be elicited and taken into consideration in order to be modified. Therefore, PTs’ explicit conceptions may constitute a valuable resource in teacher education. The aim of this study was to investigate PTs’ ideas about pupils’ difficulties, at a topic-specific level, upon beginning the teacher education programme. The “Lesson Preparation Method” was used in four case studies to elicit the conceptions of 32 PTs regarding pupils’ difficulties in four specific science and mathematics topics: plant growth, gases, equations and heat and temperature. In all four topic groups (n = 5 – 11), there was a variety of initial conceptions about pupils’ difficulties, which were categorised into two to five topic-specific categories. Although, initially, PTs may not have expressed any notions about pupils’ difficulties, conceptions were elicited by using the Lesson Preparation Method. Furthermore, we found that the initial ideas corresponded with earlier research on pupils’ difficulties, which could provide a potential resource when creating a scaffolding context in teacher education programmes where PCK development is stimulated.  相似文献   

4.
A good deal of research has tried to establish the precursors of literacy in terms of the abilities in children which are most likely to lead to good progress in reading and writing. As Monica Lazo and Peter Pumfrey point out, several aspects of metalinguistic ability have been identified as important and in their research, reported here, they found that three aspects of this ability were particularly significant to children's literacy development. These aspects, phonological awareness, print awareness and semantic/syntactic awareness seem to play crucial roles in children's reading and spelling but not in isolation. It is the combination of these which seems to make the difference, a finding with important implications for teachers of early literacy.  相似文献   

5.
This paper reports on research concerning Greek in-service Primary teachers’ perceptions about environmental issues and attitudes towards Education for Sustainable Development. A questionnaire with multiple-choice and open-ended questions was used in order to gain more comprehensive understanding of their thoughts. The analysis of data revealed that teachers hold misunderstandings or misconceptions of the conceptual meaning of the terms “sustainability” and “renewable source of energy”. Furthermore, the implementation rate of environmental programs in schools is relatively low considering teachers’ interest in the issues. This is due to lack of familiarity with new methodological approaches which promote environmental matters. By taking into account these research findings, possible implications arising from supporting teachers to implement environmental programs in schools are discussed and suggestions for overcoming the outlined difficulties are made.  相似文献   

6.
The aim of this study is to compare the effectiveness of conceptual change text instruction (CCT) in the context of energy in chemical reactions. The subjects of the study were 60, 10th grade students at a high school, who were in two different classes and taught by the same teacher. One of the classes was randomly selected as the experimental group in which CCT instruction was applied, and the other as the control group in which traditional teaching method was used. The data were obtained through the use of Energy Concept Test (ECT), the Attitude Scale towards Chemistry (ASC) and Science Process Skill Test (SPST). In order to find out the effect of the conceptual change text on students’ learning of energy concept, independent sample t-tests, ANCOVA (analysis of covariance) and ANOVA (analysis of variance) were used. Results revealed that there was a statistically significant mean difference between the experimental and control group in terms of students’ ECT total mean scores; however, there was no statistically significant difference between the experimental and control group in terms of students’ attitude towards chemistry. These findings suggest that conceptual change text instruction enhances the understanding and achievement.  相似文献   

7.
This paper presents the third study of research trends in science education. In this review, a total of 990 papers published in the International Journal of Science Education, the Journal of Research in Science Teaching, and Science Education from 2008 to 2012 were analyzed. The results indicate that in the recent five years (2008–2012), the top three research topics in the published papers were those regarding the context of students' learning, science teaching, and students' conceptual learning. The changes in the most popular research topics in the past 15 years also evidentially indicate shifts in the journals' preferences and researchers' interest. For example, in 2003–2007, context of students' learning replaced students' conceptual learning, which was the most published research topic from 1998 to 2002. The research topic of students' learning contexts continued to rank the first in 2008–2012. Moreover, there was an increasing trend of research papers regarding science teaching from 1998 to 2012. The analysis of highly cited papers revealed that research topics such as argumentation, inquiry-based learning, and scientific modeling were recently highlighted by science educators. In recent 15 years, productive researchers' publications also focused on the topics about context of students' learning, science teaching, and students' conceptual learning.  相似文献   

8.
The objectives of this study are: (a) Evaluate science major freshman students’ ability to differentiate between heat energy and temperature, after having studied the topic of thermochemistry; (b) ascertain the degree to which students resist change from the caloric to the kinetic-molecular theory; (c) study the ability to differentiate between heat energy and temperature and its relationship to solving a problem of thermochemistry. Science major freshman students (n = 76) were tested on a three-item Test of Heat Energy and Temperature (THT) and a Thermochemistry Problem (TP). Both THT and the TP formed part of a semester exam given after the topic of thermochemistry had been studied in class. Results obtained show that even after having studied thermochemistry in an introductory freshman course, students have considerable difficulty in differentiating between heat energy and temperature. Although, all three items of THT required the understanding of kinetic-molecular theory, percentage of correct responses varied considerably: Item 1 (72%), Item 2 (64%), and Item 3 (51%). A correct response on Item 3 meant that different amounts of water in two different vessels at 100 °C, would have the same average kinetic energy, but the heat energy required to attain 100 °C was different—hence the confusion with heat as a substance (caloric theory). It was found that students who had good conceptual understanding on the TP did not perform significantly (χ 2 = 0.023) better on the THT. It is concluded that as science teachers we must be aware of the difficulties associated with the differentiation between heat energy and temperature and hence the need for teaching thermochemistry in order to facilitate conceptual understanding.  相似文献   

9.
Self-regulated learning has been described as an adaptive process: students adapt their learning strategies for attaining different learning goals. In order to be adaptive, students must have a clear notion of what the task requirements consist of. Both trace data and questionnaire data indicate that students adapt study strategies in limited ways and that their awareness of task demands seems to be low. In the present think-aloud study we examined task awareness of tenth-graders who selected text fragments in three different selection tasks. Students’ task awareness was analysed at a global and a local task level. Awareness at the global task level refers to processing the instruction and reflecting about general selection goals; awareness at the local task level includes spontaneous reasoning about selecting specific text fragments. On either level, students showed difficulties in verbalizing task demands. In line with previous work, tenth-graders apparently experience a limited awareness of task demands.  相似文献   

10.
Several research studies linking early phonemic awareness to the prevention of later reading difficulties strongly suggest that phoneme segmentation and blending, rather than rhyming and alliteration abilities, are the key aspects of phonemic awareness that are related to the prevention of difficulties. Yet there is a persistent belief among many educators that instruction in rhyming and alliteration are adequate to develop phonemic awareness and developmentally more appropriate than segmentation and blending activities. Using quasi-experimental methods, I evaluated two approaches for teaching phonemic awareness to 4- and 5-year-old children in four Head Start classrooms. The first approach focused on rhymes, alliteration, and story activities. The second approach focused on phoneme segmentation and blending in the context of sounding out actual words. Results showed that children taught using the second approach produced significantly greater gains in phonemic awareness and letter–sound knowledge, compared to children using the first approach. Both approaches were more effective when teachers had previously taught attention skills to their children.  相似文献   

11.
To achieve the goal of scientific literacy, the skills of argumentation have been emphasized in science education during the past decades. But the extent to which students can apply scientific knowledge to their argumentation is still unclear. The purpose of this study was to analyse 80 Swedish upper secondary students’ informal argumentation on four socioscientific issues (SSIs) to explore students’ use of supporting reasons and to what extent students used scientific knowledge in their arguments. Eighty upper secondary students were asked to express their opinions on one SSI topic they chose through written reports. The four SSIs in this study include global warming, genetically modified organisms (GMO), nuclear power, and consumption. To analyse students’ supporting reasons from a holistic view, we used the SEE-SEP model, which links the six subject areas of sociology/culture (So), environment (En), economy (Ec), science (Sc), ethics/morality (Et) and policy (Po) connecting with three aspects, knowledge, value and personal experience (KVP). The results showed that students used value to a greater extent (67%) than they did scientific knowledge (27%) for all four SSI topics. According to the SEE-SEP model, the distribution of supporting reasons generated by students differed among the SSI topics. Also, some alternative concepts were disclosed in students’ arguments. The implications for research and education are discussed.  相似文献   

12.
The aims of this study were to determine the underlying conceptual structure of the thermal concept evaluation (TCE) questionnaire, a pencil-and-paper instrument about everyday contexts of heat, temperature, and heat transfer, to investigate students’ conceptual understanding of thermal concepts in everyday contexts across several school years and to analyse the variables—school year, science subjects currently being studied, and science subjects previously studied in thermal energy—that influence students’ thermal conceptual understanding. The TCE, which was administered to 515 Korean students from years 10–12, was developed in Australia, using students’ alternative conceptions derived from the research literature. The conceptual structure comprised four groups—heat transfer and temperature changes, boiling, heat conductivity and equilibrium, and freezing and melting—using 19 of the 26 items in the original questionnaire. Depending on the year group, 25–55% of students experienced difficulties in applying scientific concepts in everyday contexts. Years of schooling, science subjects currently studied and physics topics previously studied correlated with development of students’ conceptual understanding, especially in topics relating to heat transfer, temperature scales, specific heat capacity, homeostasis, and thermodynamics. Although students did improve their conceptual understandings in later years of schooling, they still had difficulties in relating the scientific concepts to their experiences in everyday contexts. The study illustrates the utility of using a pencil-and-paper questionnaire to identify students’ understanding of thermal concepts in everyday situations and provides a baseline for Korean students’ achievement in terms of physics in everyday contexts, one of the objectives of the Korean national curriculum reforms.  相似文献   

13.
衡水学院大学生科研创新课题选题从总体上讲是较好的,但也存在着选题过大、表述不完整、选题应用性滞后、选题重复等问题.对此应该从以下几方面进行调整与完善:选题要小而具体;教师指导要给力,避免重复选题;选题对实践要有指导价值;选题要结合自己熟悉的领域做深入探究;还要考虑自己的科研能力与完成的可行性.  相似文献   

14.
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15.
The theoretical background and different methods ofconcept mapping for use in teaching and in research on learning processes are discussed. Two mathematical projects, one on fractions and one on geometry, are presented in more detail. In the first one special characteristics of concept maps were elaborated. In the second one concept mapping allowed students' individual understanding to be monitored over time and provided information about students' conceptual understanding that would not have been obtained using other methods. Regarding the students' individual concept maps in more detail there were some additional findings: (i) The characteristics of the maps change remarkably from fourth grade to sixth grade; (ii) There is some evidence that prior knowledge related to some mathematical topics plays a very important role in students' learning behaviour and in their achievement; (iii) Concept maps provide information about how individual students relate concepts to form organised conceptual frameworks; (iv) Long-term difficulties with specific concepts are able to be traced. These findings are discussed with regard to results of other studies as well as to their implications for the teaching of mathematics in the classroom.  相似文献   

16.
Following a series of reviews every 5 years since 1998, this fourth study presents the research trends in science education based on 1,088 research articles published in Science Education, Journal of Research in Science Teaching, and International Journal of Science Education from 2013 to 2017. The top three research topics, that is, the context of students’ learning, science teaching, and students’ conceptual learning were still emphasized by researchers in the period of 2013–2017. It is also evident that researchers have undoubtedly changed their preferences of research topics in the three journals within the 2 decades. For example, the topic concerning conceptual understanding, alternative conceptions, and conceptual change (Learning-Conceptions) was in continuous decline from 2003 to 2017, although it ranked as the top topic in the 1998–2002 period. The research topic of Teaching continuously ranked second in the 2008–2012 as well as in the 2013–2017 periods. Yet, the declining trend of Goals, Policy, and Curriculum reported in the last review was not observed in the latest period. The analysis of the top 10 most-cited papers unveiled that the issues such as inequality in science education, STEM education, and undergraduate research experiences were gradually highlighted.  相似文献   

17.
The first part of this paper reviews the criteria offered by du Boulay, O'Shea and Monk (1981) for designing a coneeptual model of a programming environment for teaching novices programming. It argues that although the criteria offered, namely simplicity and visibility, are helpful, these criteria alone are not sufficient as they do not address the choice of which aspects of the conceptual model are to be presented to the learner. In order to address this issue it is necessary to carve up the conceptual model differently and to distinguish different aspects. One important aspect for novices is a functional view, as this will help them develop programming plans. A new complementary categorisation is offered which offers three views of the conceptual model: namely state, procedure and function, and adds a new criterion, namely consistency. Two languages designed for novices using the general criteria of du Boulay, O'Shea and Monk are then analysed in detail, firstly using du Boulay et al.'s criteria, and secondly using the proposed categorisation. Data from novices learning to program in the two languages shows that although the languages had been satisfactorily designed according to du Boulay et al.'s criteria, a number of learning difficulties remained, which were satisfactorily accounted for by the new categorisation.  相似文献   

18.
As people attempt to make sense of the world, they develop personal knowledge structures. These structures often contain misconceptions—inaccurate or incomplete information—that are highly resistant to change because existing knowledge networks must be restructured to accommodate counterintuitive information in a process known as conceptual change. Since textbooks are the dominant resource for science instruction in most classrooms, text-based methods of facilitating conceptual change need to be examined. Since the mid-1980 s, researchers have investigated the conceptual change potential of refutation text, a text structure that includes elements of argumentation and that has been described as one of the most effective text-based means for modifying readers’ misconceptions. In this paper, twenty years of refutation text research in science and reading education is reviewed and then a secondary analysis of those results is conducted to explore developmental aspects of the efficacy of refutation text. Although a developmental relationship was not revealed, two decades of research indicate that reading refutation text rather than traditional expository text is more likely to result in conceptual change.  相似文献   

19.
A large body of research in the conceptual change tradition has shown the difficulty of learning fundamental science concepts, yet conceptual change schemes have failed to convincingly demonstrate improvements in supporting significant student learning. Recent work in cognitive science has challenged this purely conceptual view of learning, emphasising the role of language, and the importance of personal and contextual aspects of understanding science. The research described in this paper is designed around the notion that learning involves the recognition and development of students’ representational resources. In particular, we argue that conceptual difficulties with the concept of force are fundamentally representational in nature. This paper describes a classroom sequence in force that focuses on representations and their negotiation, and reports on the effectiveness of this perspective in guiding teaching, and in providing insight into student learning. Classroom sequences involving three teachers were videotaped using a combined focus on the teacher and groups of students. Video analysis software was used to capture the variety of representations used, and sequences of representational negotiation. Stimulated recall interviews were conducted with teachers and students. The paper reports on the nature of the pedagogies developed as part of this representational focus, its effectiveness in supporting student learning, and on the pedagogical and epistemological challenges negotiated by teachers in implementing this approach.  相似文献   

20.
Phonological awareness is a key factor in the development of literacy, and frequently presents itself as an area of weakness in pupils with reading difficulties. In this article, Anies Al-Hroub of the American University of Beirut sets out to define a distinguishing pattern of characteristics that supports the identification of pupils with specific learning difficulties who are gifted in mathematics and reports the assessment of the pupils' visual and auditory perceptual skills, including phonological awareness. The assessments were designed to measure auditory and visual memory skills, auditory and visual analysis skills, speed of information processing and spoken language (receptive and expressive). Furthermore, aspects of language learning such as reading, writing, spelling and parts of listening ability were all assessed for mathematically gifted pupils with specific learning difficulties who scored above the cut-off score of 120 on the WISC-III-Jordan. The article closes with recommendations for further research.  相似文献   

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