Mapping the knowledge structure exhibited by a cohort of students based on their understanding of how a galvanic cell produces energy

This study evaluates the use of an open‐ended question to determine students' knowledge structure on the topic of galvanic cells. The open‐ended question was developed and administered to 163 Grade 10 students who had earlier completed a course on electrochemistry. Students' responses were marked as well as coded on the basis of the fields identified from their responses. This was then evaluated statistically to determine the collective knowledge structure of the sample of students. The knowledge structure thus mapped contains both canonical concepts and alternative conceptions (ACs). An important finding emerging from this study is that instructors need to focus student's attention on the dynamic processes involving electrons and ions during the operation of galvanic cells. In order for students to fully understand how a galvanic cell operates, they need to see the whole picture. There are three critical components that lead to students' understanding of how an oxidation–reduction reaction can generate energy and how a circuit is complete: transfer of electrons during oxidation–reduction half‐reactions, flow of electrons within metals, and migration of ions in solution. Also, we found that it is possible for students to use correct chemistry concepts in an incorrect way by establishing linkages among these in an inappropriate manner. We reiterate that apart from evaluating students' ACs, it is also important to evaluate the links between the concepts and conceptions present in students' knowledge structure so that teaching can be made more effective.     

A learning progression for energy in socio‐ecological systems

This article reports on our work of developing a learning progression focusing on K‐12 students' performances of using energy concept in their accounts of carbon‐transforming processes in socio‐ecological systems. Carbon‐transforming processes—the ecological carbon cycle and the combustion of biomass and fossil fuels—provide all of the energy for living systems and almost 90% of the energy for human economic activities. Energy, as a crosscutting concept across major disciplines, is a tool for analysis that uses the principle of energy conservation to constrain and connect accounts of processes and systems. Drawing on ideas from cognitive linguistics, the history of science, and research on students' energy conceptions, we identify two crucial practices that both scientists and students engage in when accounting for carbon‐transforming processes: association and tracing. Using association and tracing as progress variables, we analyzed student accounts of carbon‐transforming processes in 48 clinical interviews and 3,903 written tests administered to students from fourth grade through high school. Based on our analysis we developed a Learning Progression Framework that describes a progression from accounts that use energy as an ephemeral “force” that enables actors to make events happen to energy as a scientific tool for analysis. Successful students developed a sense of necessity with respect to accounts of carbon‐transforming processes—a sense that energy MUST be conserved and degraded in every individual process and in the system as a whole. This level of success was achieved by <3% of the students in our sample. Implications for science standards, curriculum, and instruction are discussed. © 2012 Wiley Periodicals, Inc. J Res Sci Teach 49: 1149–1180, 2012     

Technology-Mediated Writing Instruction in the Early Literacy Program: Perils,Procedures, and Possibilities

The purpose of this qualitative case study was to examine one kindergarten teacher's use of digital and multimodal technologies to mediate early writing instruction and explore the students' appropriation of that instruction to support their independent writing. Data sources included observations of writing instruction, as well as students' participation during independent writing time, student writing samples, and interviews with case study participants. Data were analyzed inductively using a semantic relationship analysis (Hatch, 2002). Results of the study revealed that the teacher used a range of technologies to demonstrate what it means to compose narrative texts and how young children could go about it. Students were attentive and motivated to participate in writing instruction and related activities, given their fascination with the technology and multimodal texts their teacher created. Students appropriated important concepts and strategies from their teacher's technology-mediated instruction, which they used to compose narrative texts during independent writing time.     

Development and evaluation of the conceptual inventory of natural selection

Natural selection as a mechanism of evolution is a central concept in biology; yet, most nonbiology‐majors do not thoroughly understand the theory even after instruction. Many alternative conceptions on this topic have been identified, indicating that the job of the instructor is a difficult one. This article presents a new diagnostic test to assess students' understanding of natural selection. The test items are based on actual scientific studies of natural selection, whereas previous tests have employed hypothetical situations that were often misleading or oversimplified. The Conceptual Inventory of Natural Selection (CINS) is a 20‐item multiple choice test that employs common alternative conceptions as distractors. An original 12‐item version of the test was field‐tested with 170 nonmajors in 6 classes and 43 biology majors in 1 class at 3 community colleges. The test scores of one subset of nonmajors (n = 7) were compared with the students' performances in semistructured interviews. There was a positive correlation between the test scores and the interview scores. The current 20‐item version of the CINS was field‐tested with 206 students in a nonmajors' general biology course. The face validity, internal validity, reliability, and readability of the CINS are discussed. Results indicate that the CINS will be a valuable tool for instructors. © 2002 Wiley Periodicals, Inc. J Res Sci Teach 39: 952–978, 2002     

A window into thinking: Using student writing to understand conceptual change in science learning

This study, conducted in an inner-city middle school, followed the conceptual changes shown in 25 students' writing over a 12-week science unit. Conceptual changes for 6 target students are reported. Student understanding was assessed regarding the nature of matter and physical change by paper-and-pencil pretest and posttest. The 6 target students were interviewed about the goal concepts before and after instruction. Students' writing during lesson activities provided qualitative data about their understandings of the goal concepts across the science unit. The researcher constructed concept maps from students' written statements and compared the maps across time to assess changes in the schema of core concepts, complexity, and organization as a result of instruction. Target students' changes were studied in detail to determine patterns of conceptual change. After patterns were located in target students' maps, the remaining 19 students' maps were analyzed for similar patterns. The ideas that students identified in their writing showed changes in central concepts, complexity, and organization as the lessons progressed. When instructional events were analyzed in relation to students' demonstrated ideas, understanding of the goal conceptions appeared in students' writing more often when students had opportunities to explain their new ideas orally and in writing.     

Formative assessment strategies for students' conceptions—The potential of learning analytics

Formative assessment is considered to be helpful in students' learning support and teaching design. Following Aufschnaiter's and Alonzo's framework, formative assessment practices of teachers can be subdivided into three practices: eliciting evidence, interpreting evidence and responding. Since students' conceptions are judged to be important for meaningful learning across disciplines, teachers are required to assess their students' conceptions. The focus of this article lies on the discussion of learning analytics for supporting the assessment of students' conceptions in class. The existing and potential contributions of learning analytics are discussed related to the named formative assessment framework in order to enhance the teachers' options to consider individual students' conceptions. We refer to findings from biology and computer science education on existing assessment tools and identify limitations and potentials with respect to the assessment of students' conceptions.

Practitioner notes

What is already known about this topic

• Students' conceptions are considered to be important for learning processes, but interpreting evidence for learning with respect to students' conceptions is challenging for teachers.
• Assessment tools have been developed in different educational domains for teaching practice.
• Techniques from artificial intelligence and machine learning have been applied for automated assessment of specific aspects of learning.

What does the paper add

• Findings on existing assessment tools from two educational domains are summarised and limitations with respect to assessment of students' conceptions are identified.
• Relevent data that needs to be analysed for insights into students' conceptions is identified from an educational perspective.
• Potential contributions of learning analytics to support the challenging task to elicit students' conceptions are discussed.

Implications for practice and/or policy

• Learning analytics can enhance the eliciting of students' conceptions.
• Based on the analysis of existing works, further exploration and developments of analysis techniques for unstructured text and multimodal data are desirable to support the eliciting of students' conceptions.

     

issues in Portfolio Assessment: Assessing Writing Processes From Their Products

We investigated the ways that portfolio evidence of students' competencies with writing processes was created and interpreted in 4 classrooms. Our study was conducted during preliminary classroom trials of California Learning Assessment System portfolios, when teachers and students were challenged with the new task of preparing portfolios that demonstrated students' competency with the "dimensions of learning." Drawing data from teacher and student interviews as well as portfolios, we considered three issues regarding the meaning of portfolio indicators of writing processes (a) Students' opportunities to learn to use a range of resources, processes, and standards in ways that enhance the effectiveness of their writing; (b) students' opportunities to produce "hard copy" evidence of their uses of processes; and (c) students' capacities to analyze their writing processes. Further research is needed to understand how participants in a large-scale portfolio assessment program develop shared understandings of the ways that evidence of writing processes is considered in the scoring and how the programmatic needs for comparability of evidence can be reconciled with the personal needs of young writers, whose uses of processes will vary with the purposes and contexts of their writing.     

Variation in Finnish students' understanding of Lutheranism and its implications for religious education: a phenomenographic study

This article contains the results of how a selected group of Finnish upper secondary students understand Lutheranism. The data consisted of 63 students' responses to a writing task together with complementary interviews of 11 students. The outcomes of phenomenographic analysis of variation in the students' understanding of Lutheranism are presented in five hierarchically ordered categories. The implications for religious education are discussed in terms of what teachers could learn from differences in students' understandings of the subject matter in order to enhance their learning of it.     

Changing middle school students' conceptions of matter and molecules

The purpose of this study was two-fold: (1) to understand the conceptual frameworks that sixth-grade students use to explain the nature of matter and molecules, and (2) to assess the effectiveness of two alternative curriculum units in promoting students' scientific understanding. The study involved 15 sixth-grade science classes taught by 12 teachers in each of two successive years. Data were collected through paper-and-pencil tests and clinical interviews. The results revealed that students' entering conceptions differed from scientific conceptions in various ways. These differences included molecular conceptions concerning the nature, arrangement, and motion of molecules as well as macroscopic conceptions concerning the nature of matter and its physical changes. The results also showed that the students taught by the revised unit in Year 2 performed significantly better than the students taught by the original commercial curriculum unit in Year 1 for 9 of the 10 conceptual categories. Implications for science teaching and curriculum development are discussed.     

Doctoral students writing: where's the pedagogy?

Writing occupies a key role in doctoral research, because it is the principal channel students use to communicate their ideas, and the basis on which their degree is awarded. Doctoral writing can, therefore, be a source of considerable anxiety. Most doctoral candidates require support and encouragement if they are to develop confidence as writers. Drawing on interviews with two international doctoral students at an Australian university, this paper examines the writing practices the students have encountered and discusses them in the light of recent research on doctoral writing pedagogy. Analysis of the students' experiences in terms of Wenger's ‘communities of practice’ framework suggests that this perspective fails to account adequately for the power relations that impact on the students' learning opportunities. Examining the students' experiences also highlights the importance of good pedagogy in supporting the development of scholarly writing in the doctorate.     

Conceptions of Teaching Art Held by Secondary School Art Teachers

Research into teachers' conceptions of teaching can be justified in that deep seated beliefs impact upon the way teachers teach and influence the learning approaches of their students. This study examined conceptions of teaching art, through interviews with 18 secondary school art teachers in Hong Kong. The analysis resulted in a two‐level characterisation of conceptions under broad essentialist and contextualist orientations. There were four subordinate conception categories, namely moral development in art and aesthetic development in art under the essentialist orientation, and intellectual development through art, and expression and therapy through art as sub‐categories of the contextualist orientation. The categories were defined and delimited by six dimensions. The categories were seen as clearly distinguishable but related, though not hierarchically. There was no evidence of the category scheme being culturally specific, as the majority of the teachers held beliefs which were not consistent with the traditional manner of Chinese painting.     

Transition planning and writing instruction: the effects of a brief intervention

This study used a multiple probe design across behaviours to determine if four high school students with learning disabilities could plan post‐school transition goals using a modified GO 4 IT … NOW! intervention while learning essential paragraph and essay writing skills. The results of this study indicate a functional relationship between the intervention and increased writing skills needed for high‐stakes testing and increases in students' knowledge of transition planning. During baseline, students produced extremely short essays and did not include essential paragraph elements. After instruction, students wrote longer compositions and included more details, and paragraphs contained more paragraph elements. All participants increased essay quality during the intervention as measured by the rubric used to evaluate end‐of‐instruction writing prompts.     

Lasting effects of instruction guided by the conflict map: Experimental study of learning about the causes of the seasons

This study was based on the framework of the “conflict map” to facilitate student conceptual learning about causes of the seasons. Instruction guided by the conflict map emphasizes not only the use of discrepant events, but also the resolution of conflict between students' alternative conceptions and scientific conceptions, using critical events or explanations and relevant perceptions and conceptions that explicate the scientific conceptions. Two ninth grade science classes in Taiwan participated in this quasi‐experimental study in which one class was assigned to a traditional teaching group and the other class was assigned to a conflict map instruction treatment. Students' ideas were gathered through three interviews: the first was conducted 1 week after the instruction; the second 2 months afterward; and the third at 8 months after the treatment. Through an analysis of students' interview responses, it was revealed that many students, even after instruction, had a common alternative conception that seasons were determined by the earth's distance to the sun. However, the instruction guided by the framework of the conflict map was shown to be a potential way of changing the alternative conception and acquiring scientific understandings, especially in light of long‐term observations. A detailed analysis of students' ideas across the interviews also strongly suggests that researchers as well as practicing teachers need to pay particular attention to those students who can simply recall the scientific fact without deep thinking, as these students may learn science through rote memorization and soon regress to alternative conceptions after science instruction. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 1089–1111, 2005     

Promoting understanding of chemical bonding and spontaneity through student explanation and integration of ideas

This article explores the effectiveness of intervention discussion sections for a college general chemistry course designed to apply research on student preconceptions, knowledge integration, and student explanation. Two interventions, on bond energy and spontaneity, were tested and intervention student performance was compared with that of a control group that did not use the experimental pedagogy. Results indicate that this instruction, which identifies students' initial conceptions and integrates those ideas into class discussion, leads to enhanced conceptual understanding. The intervention group outperformed the control group on a written course midterm, the thermodynamics portion of a standardized American Chemical Society examination, and an in‐depth interview. In interviews, the intervention group students explained the energetics of bond breaking and formation at a more sophisticated level than did the control students. In contrast, control students were more tenuous in their thinking, tended to contradict themselves more when discussing bond energy, and harbored more misconceptions about spontaneity. © 2002 Wiley Periodicals, Inc. J Res Sci Teach 39: 464–496, 2002     

University Students’ Understanding of Electromagnetic Induction

This study examined engineering and physical science students' understanding of the electromagnetic induction (EMI) phenomena. It is assumed that significant knowledge of the EMI theory is a basic prerequisite when students have to think about electromagnetic phenomena. To analyse students' conceptions, we have taken into account the fact that individuals build mental representations to help them understand how a physical system works. Individuals use these representations to explain reality, depending on the context and the contents involved. Therefore, we have designed a questionnaire with an emphasis on explanations and an interview, so as to analyse students' reasoning. We found that most of the students failed to distinguish between macroscopic levels described in terms of fields and microscopic levels described in terms of the actions of fields. It is concluded that although the questionnaire and interviews involved a limited range of phenomena, the identified explanations fall into three main categories that can provide information for curriculum development by identifying the strengths and weaknesses of students' conceptions.     

Student‐teachers' perspectives on positive and negative social processes in school

In recent years, the Standards for Qualified Teacher Status in England have placed new emphasis on student‐teachers' ability to become integrated into the ‘corporate life of the school’ and to work with other professionals. Little research, however, has been carried out into how student‐teachers perceive the social processes and interactions that are central to such integration during their initial teacher education school placements. This study aims to shed light on these perceptions. The data, gathered from 23 student‐teachers through interviews and reflective writing, illustrate the extent to which the participants perceived such social processes as supporting or obstructing their development as teachers. Signals of inclusion, the degree of match or mismatch in students' and school colleagues' role expectations, and the social awareness of both school and student‐teacher emerged as crucial factors in this respect. The student‐teachers' accounts show their social interactions with school staff to be meaningful in developing their ‘teacher self’ and to be profoundly emotionally charged. The implications for mentor and student‐teacher role preparation are discussed in this article.     

Classroom factors related to changes in students' conceptions of the nature of science

Scientific literacy implies an adequate understanding of the nature of scientific knowledge. However, little is known about classroom factors that can influence students' conceptions of the nature of science. In the present study, classroom variables that were related to changes in students' conceptions of science were identified. Particular attention was directed toward students' overall conceptions of scientific knowledge and their views of its tentative nature. Twenty-five classroom variables were found to be significantly related to both overall and tentative conceptions, while 12 variables were found to be scale-specific. A comparison between teacher and student conceptions of science did not support the prevalent assumption that a teacher's conception of science is significantly related to changes in students' conceptions of science. “Successful” classes were defined as those exhibiting the greatest student conceptual changes toward the viewpoint held by the teacher, irrespective of the “adequacy” of the teacher's viewpoint. In general, these classes were typified by frequent inquiry-oriented questioning with little emphasis on rote memory. Implicit references to the nature of science were commonly observed. Furthermore, where greatest changes in student conceptions of science were observed, the teachers were pleasant, supportive, and frequently used anecdotes to promote instruction and establish rapport. Emphasis on the depth, breadth, and accuracy of content statistically differentiated between “successful” and “unsuccessful” classes with respect to students' overall conceptions. However, this emphasis on content presentation did not differentiate classes with respect to students' conceptions of the tentative nature of science.     

Investigation of worldview theory in a south african context

This article reports on an exploratory investigation carried out to identify conceptions of some components of worldview, based on logicostructural worldview theory, held by science student teachers in a South African context. It explores relationships among worldviews, student characteristics, and scientific concepts. The sample included 48 final-year science student teachers. Data were gathered by a questionnaire with follow-up interviews. Questions were based on Kearney's model of worldview with stimulus items related to each of seven worldview categories. Responses were categorized and examined for possible relationships. Results of the investigation indicated that students' conceptions of time and distance were nonmechanistic and psychologically bound and that authoritarian scientific explanation was considered as sufficient for proof. Some significant relationships were found between items as well as between field of study and scientific conceptions.     

Reading motivation,perceptions of reading instruction and reading amount: a comparison of junior and senior secondary students in Hong Kong

This study examined the relations between students' reading motivation, perceptions of reading instruction and reading amount, together with grade differences, in a Chinese educational context. A total of 1,146 students from 19 secondary schools in Hong Kong voluntarily responded to a questionnaire that measured these three sets of variables. The study's findings indicated that students' intrinsic motivation was most strongly related to their reading amount. Students' perceptions of the reading instruction they received in their Chinese language class were significantly related to their reading motivation, but were only indirectly related to their reading amount, being mediated through reading motivation. Consistent with previous studies, significant grade differences were found in all types of reading motivation, students' perceptions of reading instruction and students' reading amount. The findings indicated that junior secondary students had better self‐efficacy, intrinsic motivation, extrinsic motivation and social motivation than senior secondary students. The largest grade difference was in students' self‐efficacy. Junior secondary students also perceived the reading instruction in their Chinese language class as more mastery‐oriented and read more frequently than senior secondary students. The implications of these findings for understanding Chinese students' reading motivation and for planning effective reading instruction to enhance their motivation are discussed.