Refining a learning progression of energy

ABSTRACT

This paper presents a revised learning progression for the energy concept and initial findings on diverse progressions among subgroups of sample students. The revised learning progression describes how students progress towards an understanding of the energy concept along two progress variables identified from previous studies – key ideas about energy and levels of conceptual development. To assess students understanding with respect to the revised learning progression, we created a specific instrument, the Energy Concept Progression Assessment (ECPA) based on previous work on assessing students’ understanding of energy. After iteratively refining the instrument in two pilot studies, the ECPA was administered to a total of 4550 students (Grades 8–12) from schools in two districts in a major city in Mainland China. Rasch analysis was used to examine the validity of the revised learning progression and explore factors explaining different progressions. Our results confirm the validity of the four conceptual development levels. In addition, we found that although following a similar progression pattern, students’ progression rate was significantly influenced by environmental factors such as school type. In the discussion of our findings, we address the non-linear and complex nature of students’ progression in understanding energy. We conclude with illuminating our research's implication for curriculum design and energy teaching.     

Empirical validation of a modern genetics progression web for college biology students

ABSTRACT

Research in learning progressions (LPs) has been essential towards building understanding of how students’ ideas change over time. There has been little work, however, into how ideas between separate but related constructs within a multi-faceted LP relate. The purpose of this paper is to elaborate on the idea of progression webs to model connections within and between related constructs simultaneously, and to explain and demonstrate the efficacy of path analysis towards validating a hypothesised progression web for understanding of modern genetics. Specifically, we evaluate strength of evidence for a progression web based upon multiple related constructs within a multi-faceted LP describing undergraduate biology students’ understanding of genetics. We then utilise the progression web to generalise theory around how undergraduate students understand relationships between related genetics concepts, and how they use simpler concepts to scaffold those which are more complex.     

Students’ Energy Concepts at the Transition Between Primary and Secondary School

Energy is considered both a core idea and a crosscutting concept in science education. A thorough understanding of the energy concept is thought to help students learn about other (related) concepts within and across science subjects, thereby fostering scientific literacy. This study investigates students’ progression in understanding the energy concept in biological contexts at the transition from primary to lower secondary school by employing a quantitative, cross-sectional study in grades 3–6 (N?=?540) using complex multiple-choice items. Based on a model developed in a previous study, energy concepts were assessed along four aspects of energy: (1) forms and sources of energy, (2) transfer and transformation, (3) degradation and dissipation, and (4) energy conservation. Two parallel test forms (A and B) indicated energy concept scores to increase significantly by a factor of 2.3 (A)/1.7 (B) from grade 3 to grade 6. Students were observed to progress in their understanding of all four aspects of the concept and scored highest on items for energy forms. The lowest scores and the smallest gain across grades were found for energy conservation. Based on our results, we argue that despite numerous learning opportunities, students lack a more integrated understanding of energy at this stage, underlining the requirement of a more explicit approach to teaching energy to young learners. Likewise, more interdisciplinary links for energy learning between relevant contexts in each science discipline may enable older students to more efficiently use energy as a tool and crosscutting concept with which to analyze complex content.     

A Cross‐age Study of Children’s Knowledge of Apparent Celestial Motion

The US National Science Education Standards and the Benchmarks for Science Literacy recommend that students understand the apparent patterns of motion of the Sun, Moon, and stars by the end of early elementary school, yet no research has specifically examined these concepts from an Earth‐based perspective with this age group. This study examines children’s understanding of the patterns of apparent celestial motion among first‐grade, third‐grade, and eighth‐grade students, and investigates the extent to which these concepts develop from elementary to middle school in students without targeted instruction. Twenty students at each grade level (total n = 60) were interviewed using a novel interview setting: a small dome representing the sky, which allowed students to demonstrate their ideas. Analysis reveals that elementary and middle school students hold a variety of non‐scientific ideas about all aspects of apparent celestial motion. While the eighth‐grade students’ understanding of the apparent motion of the Sun shows a greater level of accuracy compared with the third‐grade students, across the majority of topics of apparent celestial motion, the overall level of accuracy shows little change from third grade to eighth grade. Just as prior research has demonstrated the need for instruction to improve children’s understanding of the nature of celestial objects and their actual motions, these results support the need for research on instructional strategies that improve students’ understanding of celestial motion as seen from their own perspective.     

Teachers’ use of learning progression-based formative assessment to inform teachers’ instructional adjustment: a case study of two physics teachers’ instruction

ABSTRACT

To explore the affordances of learning progressions (LP) in support of teachers’ formal and informal formative assessment (FFA and IFA) practices, we conducted a case study with a fine-grain-sized energy LP. The study first theorises an LP-based formative assessment model, which proposes the use of LPs in clarifying learning objectives, eliciting and interpreting students’ understanding, and acting in instruction. Then, we examine multiple iterations of two high-school teachers’ lesson plans and their enactment of the lessons to identify the instructional adjustments teachers made as part of the LP-based FFA and IFA after professional training. We found that both teachers refined the learning objectives and activities and most of their adjustments promoted students’ learning progression; their adjustments have an interdependency between objectives and activities. Both made more adjustments in the IFA than in the FFA, but the alignment with the LP was higher in FFA than in IFA. Contrary to the researchers’ expectations, both teachers perceived the LP as a content structure. However, in practice, both employed it as a reference to interpret students’ responses by comparing these responses against their own expectations. The teachers also reported collecting assessment information during teacher-student interactive activities and using this material to infer the level of students’ understanding in order to decide on the next instructional activities. Both teachers reported that the process of directly engaging with the LP formatively resulted in their having a much more nuanced sense of students’ understanding when they revisited and altered the sequence of the learning activities.     

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     

Towards a learning progression of energy

This article presents an empirical study on an initial learning progression of energy, a concept of central importance to the understanding of science. Learning progressions have been suggested as one vehicle to support the systematic and successful teaching of core science concepts. Ideally, a learning progression will provide teachers with a framework to assess students' level of understanding of a core concept and to guide students towards a more sophisticated level of understanding. Taking existing research as a point of departure, developing a learning progression involves recurring cycles of empirical validation and theoretical refinement. In this article, we report about our efforts in working towards a learning progression of energy. First, we derived an initial learning progression by utilizing existing curriculum, research on students' understanding, and development of students' understanding of energy. Second, we used these sources of guidance to develop a robust measurement instrument, the Energy Concept Assessment (ECA), based on multiple choice questions. Third, we utilized this instrument to assess the understanding of N = 1,856 students from three different grade levels, Grades 6, 8, and 10. Findings provided evidence that students from Grade 6 mostly obtain an understanding of energy forms and energy sources. Students of Grade 8 additionally demonstrate an understanding of energy transfer and transformation, whereas only students of Grade 10, and then only some of these students, achieve a deeper understanding of energy conservation. We discuss the implications of our findings against the background of existing research on students understanding of energy. Finally, further steps in working towards a learning progression of energy are identified. Zusammenfassung: Der vorliegende Artikel beschreibt den ersten Schritt in der Entwicklung und Validierung einer Learning Progression für das Energiekonzept; einem Konzept, das zentral für die Entwicklung eines tiefergehenden Versta¨?ndnisses der Naturwissenschaften ist. Learning Progressions sollen das das systematische und erfolgreiche Unterrichten zentraler naturwissenschaftlicher Konzepte unterstützen. Idealerweise sollen Learning Progressions Lehrkräften eine Rahmen bieten, den Entwicklungsstand ihrer Schülerinnen und Schüler hinsichtlich des Verständnisses zentraler naturwissenschaftlicher Konzepte einzuschätzen und Unterricht so zu gestalten, dass er die Entwicklung eines elaborierten Verständnisses befördert. Die Entwicklung einer Learning Progression beginnt mit der theoretischen Begründung einer vorläufigen Learning Progression, gefolgt von iterativen Zyklen empirischer Validierung und Überarbeitung. In diesem Artikel berichten wir über unsere Arbeiten zur Entwicklung einer Learning Progression für das Energiekonzept. Im Rahmen dieser Arbeiten wurde zunächst ausgehend von vorliegenden Befunden zum Verständnis und der Entwicklung des Verständnisses von Energie eine vorläufige Learning Progression begründet. Im zweiten Schritt wurde auf Grundlage der Learning Progression ein entsprechendes Instrument auf Basis von Multiple‐Choice‐Aufgaben entwickelt – das Energy Concept Assessment (ECA). Im dritten und letzten Schritt wurde das Instrument eingesetzt, um das Verständnis von Energie bei N = 1856 Schülerinnen und Schülern der Jahrgänge 6, 8 und 10 zu erfassen. Die Ergebnisse unserer Untersuchung legen nahe, dass Schülerinnen und Schüler aus Jahrgang 6 im Wesentlichen über ein Verständnis von Energieformen und –quellen verfügen. Schülerinnen und Schüler aus Jahrgang 8 zeigen darüber hinaus ein Verständnis von Energieumwandlung und –transport. Ein Verständnis von Energieerhaltung ist nur von Schülerinnen und Schüler aus Jahrgang 10 und dann auch nur von einem Teil dieser Schülerinnen und Schüler zu erwarten. Vor dem Hintergrund dieser Ergebnisse und der bisherigen Forschung zum Energieverständnis, diskutiert der Artikel weitere Schritte für die die Entwicklung einer Learning Progression für das Energiekonzept. © 2012 Wiley Periodicals, Inc. J Res Sci Teach 50:162–188, 2013     

Students’ Conceptions of Ionisation Energy: A Cross‐cultural Study

Previous studies have indicated that A‐level students in the UK and Singapore have difficulty learning the topic of ionisation energy. A two‐tier multiple‐choice instrument developed in Singapore in an earlier study, the Ionisation Energy Diagnostic Instrument, was administered to A‐level students in the UK, advanced placement high school students in the USA, and first‐year university students in China, New Zealand, and Spain to determine whether the students from different countries and educational systems had similar conceptions and difficulties as the students in Singapore with the concepts assessed in the instrument. The results showed that, in general, the students in all six samples had similar alternative conceptions, which were grouped under the categories of octet rule framework, stable fully‐filled and half‐filled subshell conceptions, and conservation of force thinking. The students also resorted to relation‐based thinking when answering items involving the trend of ionisation energies across Period 3. Implications for teaching and further research are discussed.     

Evaluating Secondary Students’ Scientific Reasoning in Genetics Using a Two‐Tier Diagnostic Instrument

While genetics has remained as one key topic in school science, it continues to be conceptually and linguistically difficult for students with the concomitant debates as to what should be taught in the age of biotechnology. This article documents the development and implementation of a two‐tier multiple‐choice instrument for diagnosing grades 10 and 12 students’ understanding of genetics in terms of reasoning. The pretest and posttest forms of the diagnostic instrument were used alongside other methods in evaluating students’ understanding of genetics in a case‐based qualitative study on teaching and learning with multiple representations in three Western Australian secondary schools. Previous studies have shown that a two‐tier diagnostic instrument is useful in probing students’ understanding or misunderstanding of scientific concepts and ideas. The diagnostic instrument in this study was designed and then progressively refined, improved, and implemented to evaluate student understanding of genetics in three case schools. The final version of the instrument had Cronbach’s alpha reliability of 0.75 and 0.64, respectively, for its pretest and the posttest forms when it was administered to a group of grade 12 students (n = 17). This two‐tier diagnostic instrument complemented other qualitative data collection methods in this research in generating a more holistic picture of student conceptual learning of genetics in terms of scientific reasoning. Implications of the findings of this study using the diagnostic instrument are discussed.     

An educational game for learning human immunology: What do students learn and how do they perceive?

The scientific concepts of human immunology are inherently complicated and extremely difficult to understand. Hence, this study reports on the development of an educational game entitled Humunology and examines the impact of using Humunology for learning how the body's defense system works. A total of 132 middle school students participated in this study and a quasi‐experimental approach with a two‐group pretest/posttest research design was used. A knowledge assessment including 19 items was developed, and a questionnaire instrument with seven dimensions, which focuses mainly on perceptions toward the use of Humunology, and the help‐seeking behaviors of the students, was employed. The results show that students who learned by playing Humunology significantly outperformed those who learned by using web‐based content on items that examined their understanding of procedural knowledge and higher level of cognitive process. Students in the experimental group also had a significantly higher level of satisfaction than their counterparts. In terms of predicting a student's learning achievement on the posttest, the three positive variables were the results of the pretest, perceived ease of use, peer learning and help‐seeking behaviors. The only negative one was perceived playfulness. The implications and suggestions for further research derived from these findings are discussed.     

Using wikis to promote quality learning in teacher training

This paper discusses writing as a social practice and speculates on how wikis might be used to promote higher quality academic writing and support collaborative learning. This study of undergraduate teacher trainees’ online learning activities focuses on how shared spaces – wikis – might be used to communicate ideas and generate course‐specific content. The study also explored how students, through such activities, were able to improve their academic writing skills and engage more critically in learning. Data captured from student discussion boards and a post‐module email questionnaire (n = 35) were used to map student perceptions of the usefulness of wikis in support of their academic studies. The data indicate that most students raised their skill level in writing directly to the publicly viewable wiki space, in sharp contrast to the more informal content they posted on the discussion boards. The scope of collaborative writing was limited due to students’ reluctance to edit each others’ work, but students appreciated the shared environment as a means of discussing their work and the content of the course. Students reported that their academic writing skills had improved through their formal participation in the wiki.     

A Technology‐Enhanced Unit of Modeling Static Electricity: Integrating scientific explanations and everyday observations

What trajectories do students follow as they connect their observations of electrostatic phenomena to atomic‐level visualizations? We designed an electrostatics unit, using the knowledge integration framework to help students link observations and scientific ideas. We analyze how learners integrate ideas about charges, charged particles, energy, and observable events. We compare learning enactments in a typical school and a magnet school in the USA. We use pre‐tests, post‐tests, embedded notes, and delayed post‐tests to capture the trajectories of students’ knowledge integration. We analyze how visualizations help students grapple with abstract electrostatics concepts such as induction. We find that overall students gain more sophisticated ideas. They can interpret dynamic, interactive visualizations, and connect charge‐ and particle‐based explanations to interpret observable events. Students continue to have difficulty in applying the energy‐based explanation.     

Hydrodistillation and antimicrobial properties of lemongrass oil (Cymbopogon citratus,Stapf): An undergraduate laboratory exercise bridging chemistry and microbiology

A traditional classroom usually focuses on concepts from a specific discipline. However, solving complex real‐world problems requires integration and application of knowledge from various fields. Here, we describe a 4‐hr undergraduate‐level laboratory exercise that utilizes concepts of extraction and biological property, bridging between chemistry and microbiology courses. In the first half of this exercise, students performed hydrodistillation to extract essential oil from a locally available herb, lemongrass (Cymbopogon citratus, Stapf). In the second half, students investigated the potential antimicrobial activity of the extracted oil against various microorganisms using the Kirby–Bauer disk diffusion method. Students also developed their own experimental questions based on the extracted oil and the antimicrobial testing technique. Self‐assessment questionnaire shows students’ appreciation of the experiments and substantial learning gains in the extraction process, properties of the extracts, and antimicrobial activity testing. This laboratory exercise prompts students to formulate their own experimental questions and engages students in interdisciplinary experimentation.     

‘I wish color had no history’: an exploration of identity through student performance poetry

ABSTRACT

This article focuses on multiracial student experiences using co-created ethnographic data with two students’ spoken word poetry. The students considered their own history, their origins and discovered a complexity – and found that their struggle was not exclusively internal. External expectations of singular categorizations and social understanding of behavior played a role in students’ identity construction. The students exhibited an internalization of expectations, as they reflected on their developing identities in their writing. They also indicated that they found ways to resist the expectations and forms of power. The results further discussions related to the modern understanding of identity fluidity and raises the question of why identity, in the modern context, continues to be seen as fixed. The research enabled students to reflect on the complex nature of identity and present a nuanced picture of their unique identity struggles, and their awareness of the social constructs and expectations of others.     

From Words to Concepts: Focusing on Word Knowledge When Teaching for Conceptual Understanding Within an Inquiry-Based Science Setting

This qualitative video study explores how two elementary school teachers taught for conceptual understanding throughout different phases of science inquiry. The teachers implemented teaching materials with a focus on learning science key concepts through the development of word knowledge. A framework for word knowledge was applied to examine the students’ level of word knowledge manifested in their talk. In this framework, highly developed knowledge of a word is conceptual knowledge. This includes understanding how the word is situated within a network of other words and ideas. The results suggest that students’ level of word knowledge develops toward conceptual knowledge when the students are required to apply the key concepts in their talk throughout all phases of inquiry. When the students become familiar with the key concepts through the initial inquiry activities, the students use the concepts as tools for furthering their conceptual understanding when they discuss their ideas and findings. However, conceptual understanding is not promoted when teachers do the talking for the students, rephrasing their responses into the correct answer or neglecting to address the students’ everyday perceptions of scientific phenomena.     

Seeing epistemic order: construction and transmission of evaluative criteria

This paper focuses on formative assessment in the field of higher education. It examines Bernstein’s work on vertical discourses and knowledge structures with the view to deepening understanding of the concept of assessment for learning. The first part of the paper draws on Vygotsky’s work on concept development and Bernstein’s work on knowledge structures to explain why ‘generalisation’ and ‘hierarchy’ are central in knowledge acquisition. It then explores Bernstein’s claim that, within the vertical discourse, different knowledge structures (hierarchical and horizontal) afford greater or lesser visibility of their epistemic structure, and thus of their evaluation criteria of what counts as a legitimate text. The second part of the paper investigates the ways epistemic expectations are signalled through the practice of evaluation to first‐year university students in a professional education course and proposes that markers do not offer students stuffiest access to recognition rules necessary for producing legitimate texts in the future. Drawing on Maton’s distinction between semantic gravity and semantic density, the paper offers an example of how markers could recast what is present in students’ work to offer students access to key ordering principles in vertical discourses.     

'Lesson Rainbow': the use of multiple representations in an Internet-based, discipline-integrated science lesson

This paper presents the development and evaluation of a web‐based lesson—Lesson Rainbow. This lesson features multiple representations (MRs), which purposefully deliver concepts in relation to distinctive disciplinary subject areas through story‐based animations that are closely related to learners’ life experiences. The researchers selected 58 2nd‐year junior high school students as the participants (32 males and 26 females). A quasi‐experimental method together with semi‐structured interviews was utilised. This research project was intended to investigate students’ conceptual progress, and to evaluate the use of MRs and of situated learning components in the design of Lesson Rainbow. The statistical results indicated that: (1) students’ science concepts significantly increased (t= 3.84, p < 0.01) through the use of Lesson Rainbow, and (2) students thought that the use of MRs in this web‐based lesson was an effective pedagogical tool inasmuch as it allows for the learning of specific theoretical viewpoints in addition to the necessary background information. Lesson Rainbow employing MRs helps learners to understand the meanings of, and interrelationships between, different kinds of external representations. This kind of design facilitates their understanding of the correspondence between abstract symbolic expressions and real‐world situations.