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1.
Dealing with representations is a crucial skill for students and such representational competence is essential for learning science. This study analysed the relationship between representational competence and content knowledge, student perceptions of teaching practices concerning the use of different representations, and their impact on students' outcome over a teaching unit. Participants were 931 students in 51 secondary school classes. Representational competence and content knowledge were interactively related. Representational aspects were only moderately included in teaching and students did not develop rich representational competence although content knowledge increased significantly. Multilevel regression showed that student perceptions of interpreting and constructing visual-graphical representations and active social construction of knowledge predicted students' outcome at class level, whereas the individually perceived amount of terms and use of symbolic representations influenced the students' achievement at individual level. Methodological and practical implications of these findings are discussed in relation to the development of representational competence in classrooms.  相似文献   

2.
Representational competence is a target of novel learning environments given the assumption that improved representational competence improves learning in science. There exists little evidence, however, that improving representational competence is positively correlated with learning outcomes across science disciplines. In this report, we argue that the previously reported weak relationships between representational competence and science learning outcomes have resulted from designs that do not explicitly analyze the discipline‐specific skills related to the representational competence construct. Here, we demonstrate through a detailed analysis of students' representation use that at least two demonstrated skills comprising representational competence (e.g., construction and selection) are not strongly related to improved conceptual understanding in the domain. We discuss the implications of these results for the design of future learning environments that aim to improve learning through improved representational competence.  相似文献   

3.
This study explores the process of teacher scaffolding student engagement in epistemic tools from the critical sensemaking perspective. Epistemic tools are contextual artifacts manipulated to investigate and evaluate ideas to construct knowledge within the constraints of a disciplines' representational means. The main sources of our data are ~50 min-long semistructured, responsive interviews with the 14 secondary school science teachers who participated in our professional learning environment (PLE) and implemented the activities from the PLE in their classrooms. We utilized the tools of discourse analysis to explore teacher sensemaking while they learned to teach science with epistemic tools. We then looked at intertextualities of meaning across multiple sets of data such as students' artifacts, pre/postsurveys, audio and video recordings of the workshops, and teachers' written implementation feedback forms. As a result, we recognized a pattern across different classrooms. Teachers would begin with a contextualized goal, and use a pedagogical strategy to scaffold their students as they worked to achieve that goal. Then, all teachers reported they faced some sort of ambiguity (such as grappling with failure, different levels of students). When faced with an ambiguity, teachers would then revise either their contextualized goal or their initial pedagogical strategy to help their students to reach their goals. Finally, we utilized constant-comparative analysis to identify themes for teachers' contextualized goals. Four major themes emerged, including communicating connections to core ideas of science, making sense of how science works, assessing students' learning process outcomes, and fostering students' epistemic agency. The findings of the study have implications for future research and professional development activities on the use of epistemic practices and tools in classrooms with unique contextual characteristics.  相似文献   

4.
Interest in measuring and evaluating student learning in higher education is growing. There are many tools available to assess student learning. However, the use of such tools may be more or less appropriate under various conditions. This study provides some evidence related to the appropriate use of pre/post‐tests. The question of whether graded tests elicit a higher level of performance (better representation of actual learning gains) than ungraded post‐tests is examined. We examine whether the difficulty level of the questions asked (knowledge/comprehension vs. analysis/application) affects this difference. We test whether the student’s level in the degree programme affects this difference. Results indicate that post‐tests may not demonstrate the full level of student mastery of learning objectives and that both the difficulty level of the questions asked and the level of students in their degree programme affect the difference between graded and ungraded assessments. Some of these differences may be due to causes other than grades on the assessments. Students may have benefited from the post‐test, as a review of the material, or from additional studying between the post‐test and the final examination. Results also indicate that pre‐tests can be useful in identifying appropriate changes in course materials over time.  相似文献   

5.
Reform based curriculum offer a promising avenue to support greater student achievement in science. Yet teachers frequently adapt innovative curriculum when they use them in their own classrooms. In this study, we examine how 19 teachers adapted an inquiry‐oriented middle school science curriculum. Specifically, we investigate how teachers' curricular adaptations (amount of time, level of completion, and activity structures), teacher self‐efficacy (teacher comfort and student understanding), and teacher experience enacting the unit influenced student learning. Data sources included curriculum surveys, videotape observations of focal teachers, and pre‐ and post‐tests from 1,234 students. Our analyses using hierarchical linear modeling found that 38% of the variance in student gain scores occurred between teachers. Two variables significantly predicted student learning: teacher experience and activity structure. Teachers who had previously taught the inquiry‐oriented curriculum had greater student gains. For activity structure, students who completed investigations themselves had greater learning gains compared to students in classrooms who observed their teacher completing the investigations as demonstrations. These findings suggest that it can take time for teachers to effectively use innovative science curriculum. Furthermore, this study provides evidence for the importance of having students actively engaging in inquiry investigations to develop understandings of key science concepts. © 2010 Wiley Periodicals, Inc., J Res Sci Teach 48: 149–169, 2011  相似文献   

6.
Attaining the vision for science teaching and learning emphasized in the Framework for K‐12 Science Education and the next generation science standards (NGSS) will require major shifts in teaching practices in many science classrooms. As NGSS‐inspired cognitively demanding tasks begin to appear in more and more science classrooms, facilitating students' engagement in high‐level thinking as they work on these tasks will become an increasingly important instructional challenge to address. This study reports findings from a video‐based professional development effort (i.e., professional development [PD] that use video‐clips of instruction as the main artifact of practice to support teacher learning) to support teachers' learning to select cognitively demanding tasks and to support students' learning during the enactment of these tasks in ways that are aligned with the NGSS vision. Particularly, we focused on the NGSS's charge to get students to make sense of and deeply think about scientific ideas as students try to explain phenomena. Analyses of teachers' pre‐ and post‐PD instruction indicate that PD‐participants began to adopt instructional practices associated with facilitating these kinds of student thinking in their own classrooms. The study has implications for the design of video‐based professional development for science teachers who are learning to facilitate the NGSS vision in science classrooms.  相似文献   

7.
Using a framework of assessment literacy that included principles, tools, and purposes, this study explored the assessment literacy of 11 secondary preservice teachers. Participants?? journals, teaching philosophies, and inquiry-based science units served as data sources. We examined how the preservice teachers understood assessment tools as well as their reasons for using assessment. Additionally, we investigated how the preservice teachers incorporated assessments into inquiry-based science units. Analysis of these documents indicated that preservice teachers recognize the need to align assessments with learning goals and instructional strategies and are using a variety of assessments. They understood several ways to use assessment for learning. However, the inclusion of assessments contained within the science units did not fully align with the views of assessment the preservice teachers presented in their teaching philosophies or journals. Instead of using a variety of assessments that reflect science reforms, the preservice teachers reverted to traditional forms of assessment in their science units. Teacher education programs need to place more emphasis on developing preservice teachers?? assessment literacy so that they are better able to select and implement a variety of appropriate assessments to foster student learning.  相似文献   

8.
In this study, we have synthesized the research on visualization and representation to propose a model consisting of 4 major components of visualization competence in learning science: constructing, interpreting, transforming, and critiquing visualizations. We have developed and validated an assessment that measures students’ visualization competence of matter (VCM). We administered the VCM assessment to 762 7th to 12th grade students at 2 public high schools in Taiwan. The students had started to learn concepts of matter at the particulate level in the 7th grade. However, traditional assessments rarely measure students’ visualization competence in science. It was therefore unclear how well the students performed on visualization of matter across grade levels. Overall, the results indicated that the students’ visualization competence of matter improved as they advanced to higher grades. A significant factor accounting for the development of their visualization competence of matter is their course experience, not their age or gender. We also found that content knowledge plays only a conditional role in students developing visualization competence of that content. Implications and future studies are discussed.  相似文献   

9.
Opportunities to respond (OTR) and specific praise are two practices that may be particularly beneficial to students learning in secondary inclusive classrooms. Yet, there is relatively little research on effective inclusion practices involving secondary students with learning disabilities (LD) or studies at the secondary level. This study sought to extend the existing research by evaluating the relationship between rates of OTR and specific praise in co-taught high school core classrooms on student on-task behaviour and class engagement. This study was part of a larger study conducted during the 2010–2011 school year. First, core academic classrooms were observed and data were collected on OTR, praise, and student behaviour. OTR information was collected using an audio recording device. Class audio recordings were divided into 15-minute intervals of whole group instruction and coded for OTR, specific praise, and non-specific praise. Observation data on student behaviour and class engagement that corresponded with each 15-minute interval were identified. Results indicate low levels of teacher use of OTR and praise statements and few significant relationships found between the variables of interest. Implications for practice and future research directions are also presented.  相似文献   

10.
Compared with research on the role of student engagement with expert representations in learning science, investigation of the use and theoretical justification of student-generated representations to learn science is less common. In this paper, we present a framework that aims to integrate three perspectives to explain how and why representational construction supports learning in science. The first or semiotic perspective focuses on student use of particular features of symbolic and material tools to make meanings in science. The second or epistemic perspective focuses on how this representational construction relates to the broader picture of knowledge-building practices of inquiry in this disciplinary field, and the third or epistemological perspective focuses on how and what students can know through engaging in the challenge of representing causal accounts through these semiotic tools. We argue that each perspective entails productive constraints on students’ meaning-making as they construct and interpret their own representations. Our framework seeks to take into account the interplay of diverse cultural and cognitive resources students use in these meaning-making processes. We outline the basis for this framework before illustrating its explanatory value through a sequence of lessons on the topic of evaporation.  相似文献   

11.
ABSTRACT

In order to create conditions for students’ meaningful and rigorous intellectual engagement in science classrooms, it is critically important to help science teachers learn which strategies and approaches can be used best to develop students’ scientific literacy. Better understanding how science teachers’ instructional practices relate to student achievement can provide teachers with beneficial information about how to best engage their students in meaningful science learning. To address this need, this study examined the instructional practices that 99 secondary biology teachers used in their classrooms and employed regression to determine which instructional practices are predictive of students’ science achievement. Results revealed that the secondary science teachers who had well-managed classroom environments and who provided opportunities for their students to engage in student-directed investigation-related experiences were more likely to have increased student outcomes, as determined by teachers’ value-added measures. These findings suggest that attending to both generic and subject-specific aspects of science teachers’ instructional practice is important for understanding the underlying mechanisms that result in more effective science instruction in secondary classrooms. Implications about the use of these observational measures within teacher evaluation systems are discussed.  相似文献   

12.
Connected classroom technology (CCT) is a member of a broad class of interactive assessment devices that facilitate communication between students and teachers and allow for the rapid aggregation and display of student learning data. Technology innovations such as CCT have been demonstrated to positively impact student achievement when integrated into a variety of classroom contexts. However, teachers are unlikely to implement a new instructional practice unless they perceive the practical value of the reform. Practicality consists of three constructs: congruence with teacher’s values and practice; instrumentality—compatibility with the existing school structures; and cost/benefits—whether the reward is worth the effort. This study uses practicality as a framework for understanding CCT implementation in secondary classrooms. The experiences of three science teachers in their first year implementing CCT are compared with matched-pair mathematics teachers. Findings suggest that despite some differences in specific uses and purposes for CCT, the integration of CCT into regular classroom practice is quite similar in mathematics and science classrooms. These findings highlight important considerations for the implementation of educational technology.  相似文献   

13.
ABSTRACT: Thirty-two recent graduates from the joint food science program of Washington State Univ. (WSU) and The Univ. of Idaho (UI) and 12 of their employers participated in a survey study to assess food science program outcomes. The objective of this study was to assess the joint curriculum in its ability to prepare undergraduate students for critical thinking, problem solving, and technical competence in the food industry. Two survey tools, 1 for graduates and 1 for their employers, were designed to assess job preparedness and the skill set attained by food science program graduates. Graduates of the joint food science program generally indicated satisfaction with their food science education and suggested that they were adequately prepared for their jobs. Both students and employers indicated that most of the identified Success Skills are used daily on the job, and that graduates were well prepared with Success Skills. Graduates and employers reported adequate preparation in Food Processing and Engineering competence. Some significant differences ( P < 0.05) were found in perceived and assessed competence. Specifically, while student indicated that they were well prepared with Food Chemistry and Analysis, Food Safety and Microbiology, and Applied Food Science competence, employers indicated only adequate preparation in Food Chemistry and Analysis, and Applied Food Science competence, but poor preparation in Food Safety and Microbiology competence. The findings suggest that students should be given opportunities for self-evaluation in undergraduate courses. Because the survey models are based on Institute of Food Technologists requirements, it is expected that the surveys can be readily adopted by other institutions to assess student learning and program effectiveness.  相似文献   

14.
Contextualizing science instruction involves utilizing students' prior knowledge and everyday experiences as a catalyst for understanding challenging science concepts. This study of two middle school science classrooms examined how students utilized the contextualizing aspects of project‐based instruction and its relationship to their science learning. Observations of focus students' participation during instruction were described in terms of a contextualizing score for their use of the project features to support their learning. Pre/posttests were administered and students' final artifacts were collected and evaluated. The results of these assessments were compared with students' contextualizing scores, demonstrating a strong positive correlation between them. These findings provide evidence to support claims of contextualizing instruction as a means to facilitate student learning, and point toward future consideration of this instructional method in broader research studies and the design of science learning environments. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 45: 79–100, 2008  相似文献   

15.
Computers on wheels: an alternative to 'each one has one'   总被引：1，自引：0，他引：1  
Four fifth‐grade classrooms embarked on a modified ubiquitous computing initiative in the fall of 2003. Two 15‐computer wireless laptop carts were shared among the four classrooms in an effort to integrate technology across the curriculum and affect change in student learning and teacher pedagogy. This initiative—in contrast to other one‐to‐one programmemess and stationary labs—offers public schools alternatives to budget constraints and instructional‐space overhead. Results indicate positive teacher technology competence and confidence, as well as instructional strategies that were student‐centred made meaningful uses of technology. Teacher technological knowledge and efficacy, pedagogical knowledge, and a supportive school community seem to be strong indicators for impacting technology integration in this context.  相似文献   

16.
The move from learning science from representations to learning science with representations has many potential and undocumented complexities. This thematic analysis partially explores the trends of representational uses in science instruction, examining 80 research studies on diagram use in science. These studies, published during 2000–2014, were located through searches of journal databases and books. Open coding of the studies identified 13 themes, 6 of which were identified in at least 10% of the studies: eliciting mental models, classroom-based research, multimedia principles, teaching and learning strategies, representational competence, and student agency. A shift in emphasis on learning with rather than learning from representations was evident across the three 5-year intervals considered, mirroring a pedagogical shift from science instruction as transmission of information to constructivist approaches in which learners actively negotiate understanding and construct knowledge. The themes and topics in recent research highlight areas of active interest and reveal gaps that may prove fruitful for further research, including classroom-based studies, the role of prior knowledge, and the use of eye-tracking. The results of the research included in this thematic review of the 2000–2014 literature suggest that both interpreting and constructing representations can lead to better understanding of science concepts.  相似文献   

17.
Because of the multimodal nature of learning, doing and reporting science, it is important that students learn how to interpret, construct, relate and translate scientific representations or, in other words, to develop representational competence. Explicit instruction about multimodal representations is needed to foster students’ representational competence in the classroom. However, only a handful studies have surveyed how representations are actually used in science classes. This might be because of the fact that economical instruments for assessing the use of representations in classrooms are not available. To bridge that gap, an instrument was developed, field-tested in biology classes with 175 and 931 students, respectively, and analysed using exploratory and (multilevel) confirmatory factor analyses. Results supported an instrument with six scales and 21 items at the individual and classroom levels covering the following dimensions: (1) interpretation of visual representations, (2) construction of visual representations, (3) use of scientific texts (verbal representations), (4) use of symbolic representations, (5) number of terms used in class, and (6) the extent to which active social construction of knowledge is possible in the class. The scales showed satisfactory discriminant validity and reliability at each level. Further applications of this instrument for researchers and teachers are discussed.  相似文献   

18.
Students with learning disabilities (LD) consistently struggle with word problem solving in mathematics classes. This difficulty has made curricular, state, and national tests particularly stressful, as word problem solving has become a predominant feature of such student performance assessments. Research suggests that students with LD perform poorly on word problem‐solving items due primarily to deficits in problem representation. Therefore, it is imperative that teachers provide these students with supplemental problem‐solving instruction that specifically targets the development of representational strategies. This article describes how one representational strategy, using number lines, can be used to model word problems as part of a comprehensive problem‐solving intervention to improve the conceptual understanding of math word problems and, subsequently, the problem‐solving performance of students with LD.  相似文献   

19.
Teaching and Learning Physics in a 1:1 Laptop School   总被引：1，自引：1，他引：0  
1:1 laptop programs, in which every student is provided with a personal computer to use during the school year, permit increased and routine use of powerful, user-friendly computer-based tools. Growing numbers of 1:1 programs are reshaping the roles of teachers and learners in science classrooms. At the Denver School of Science and Technology, a public charter high school where a large percentage of students come from low-income families, 1:1 laptops are used often by teachers and students. This article describes the school’s use of laptops, the Internet, and related digital tools, especially for teaching and learning physics. The data are from teacher and student surveys, interviews, classroom observations, and document analyses. Physics students and teachers use an interactive digital textbook; Internet-based simulations (some developed by a Nobel Prize winner); word processors; digital drop boxes; email; formative electronic assessments; computer-based and stand-alone graphing calculators; probes and associated software; and digital video cameras to explore hypotheses, collaborate, engage in scientific inquiry, and to identify strengths and weaknesses of students’ understanding of physics. Technology provides students at DSST with high-quality tools to explore scientific concepts and the experiences of teachers and students illustrate effective uses of digital technology for high school physics.  相似文献   

20.
This article explores how individualized teaching methods, such as the use of work plans, create new student strategies in Norwegian lower secondary classrooms. Work plans, which are frequently set up as instructional tools in Norwegian classrooms, outline different types of tasks and requirements that the students are supposed to do during a specific period of time, normally two or three weeks. The current analyses shed light on what strategies girls and boys use when they approach work plans. Analyses of video observations and interviews with 93 students indicate that while girls tend to complete their plan during the first week or distribute the tasks evenly throughout the period, boys either finish the plan during the first week or postpone their work until the last few days. These findings suggest that the use of work plans might give some students, often low-achieving boys, too much responsibility for their own learning.  相似文献   

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