Science Education and Health Education: Locating the Connections

Context-based chemistry education aims to improve student interest and motivation in chemistry by connecting canonical chemistry concepts with real-world contexts. Implementation of context-based chemistry programmes began 20 years ago in an attempt to make the learning of chemistry meaningful for students. This paper reviews such programmes through empirical studies on six international courses, ChemCom (USA), Salters (UK), Industrial Science (Israel), Chemie im Kontext (Germany), Chemistry in Practice (The Netherlands) and PLON (The Netherlands). These studies are categorised through emergent characteristics of: relevance, interest/attitudes/motivation and deeper understanding. These characteristics can be found to an extent in a number of other curricular initiatives, such as science-technology-society approaches and problem-based learning or project-based science, the latter of which often incorporates an inquiry-based approach to science education. These initiatives in science education are also considered with a focus on the characteristics of these approaches that are emphasised in context-based education. While such curricular studies provide a starting point for discussing context-based approaches in chemistry, to advance our understanding of how students connect canonical science concepts with the real-world context, a new theoretical framework is required. A dialectical sociocultural framework originating in the work of Vygotsky is used as a referent for analysing the complex human interactions that occur in context-based classrooms, providing teachers with recent information about the pedagogical structures and resources that afford students the agency to learn.     

Students' Perceptions of Teaching in Context-based and Traditional Chemistry Classrooms: Comparing content,learning activities,and interpersonal perspectives

Context-based curriculum reforms in chemistry education are thought to bring greater diversity to the ways in which chemistry teachers organize their teaching. First and foremost, students are expected to perceive this diversity. However, empirical research on how students perceive their teacher's teaching in context-based chemistry classrooms, and whether this teaching differs from traditional chemistry lessons, is scarce. This study aims to develop our understanding of what teaching looks like, according to students, in context-based chemistry classrooms compared with traditional chemistry classrooms. As such, it might also provide a better understanding of whether teachers implement and attain the intentions of curriculum developers. To study teacher behaviour we used three theoretical perspectives deemed to be important for student learning: a content perspective, a learning activities perspective, and an interpersonal perspective. Data were collected from 480 students in 24 secondary chemistry classes in the Netherlands. Our findings suggest that, according to the students, the changes in teaching in context-based chemistry classrooms imply a lessening of the emphasis on fundamental chemistry and the use of a teacher-centred approach, compared with traditional chemistry classrooms. However, teachers in context-based chemistry classrooms seem not to display more ‘context-based’ teaching behaviour, such as emphasizing the relation between chemistry, technology, and society and using a student-centred approach. Furthermore, students in context-based chemistry classrooms perceive their teachers as having less interpersonal control and showing less affiliation than teachers in traditional chemistry classrooms. Our findings should be interpreted in the context of former and daily experiences of both teachers and students. As only chemistry is reformed in the schools in which context-based chemistry is implemented, it is challenging for both students and teachers to deal with these reforms.     

An Analysis of Teaching Competence in Science Teachers Involved in the Design of Context-based Curriculum Materials

The committees for the current Dutch context-based innovation in secondary science education employed teachers to design context-based curriculum materials. A study on the learning of science teachers in design teams for context-based curriculum materials is presented in this paper. In a correlation study, teachers with (n?=?25 and 840 students) and without (n?=?8 and 184 students) context-based curriculum material design experience were compared on context-based competence. Context-based competence comprises context handling, regulation, emphasis, design, and school innovation. Context-based teaching competence was mapped using both qualitative and quantitative research methods in a composite instrument. Due to the differences in design team set-up for different science subjects, teachers with design experience from different science subjects were also compared on their context-based competence. It was found that teachers with design experience showed more context-based competence than their non-designing colleagues. Furthermore, teachers designing for biology showed more context-based competence than their peers from other science subjects.     

Context-based assessment: creating opportunities for resonance between classroom fields and societal fields

There is on-going international interest in the relationships between assessment instruments, students’ understanding of science concepts and context-based curriculum approaches. This study extends earlier research showing that students can develop connections between contexts and concepts – called fluid transitions – when studying context-based courses. We provide an in-depth investigation of one student’s experiences with multiple contextual assessment instruments that were associated with a context-based course. We analyzed the student’s responses to context-based assessment instruments to determine the extent to which contextual tests, reports of field investigations, and extended experimental investigations afforded her opportunities to make connections between contexts and concepts. A system of categorizing student responses was developed that can inform other educators when analyzing student responses to contextual assessment. We also refine the theoretical construct of fluid transitions that informed the study initially. Implications for curriculum and assessment design are provided in light of the findings.     

Designing context-based teaching materials by transforming authentic scientific modelling practices in chemistry

ABSTRACT

One of the challenges of context-based science education is to construct high quality teaching materials. This paper presents results from a study investigating the heuristic value of an activity-based instructional framework for transformation of authentic scientific practices for use in the science classroom, in line with cultural historic activity theory (CHAT). The activity-based instructional framework was used to transform the authentic practice of Modelling Human Exposure and Uptake of Chemicals in Consumer Products into a curriculum unit. The transformation was conducted by experienced chemistry teachers well informed about CHAT. The heuristic value was judged on criteria completeness, instructiveness and appreciation. Collected data are designed curriculum materials and a focus group interview. Analysis of the designed curriculum materials indicated that the framework was highly complete and instructive, except for evoking reflection in students. Most important, the framework proved successful in operationalising CHAT into concrete guidelines for educational design. Additionally, the results show that the instructional framework is highly appreciated by the users. Further development of such instructional frameworks is important, since it fosters the construction of high quality context-based curriculum materials.     

Examining Physics Graduate Teaching Assistants’ Pedagogical Content Knowledge for Teaching a New Physics Curriculum

In this study, we investigated the pedagogical content knowledge (PCK) that physics graduate teaching assistants (TAs) developed in the context of teaching a new introductory physics curriculum, Matter and Interactions (M&I). M&I is an innovative introductory physics course that emphasizes a unified framework for understanding the world and presents physics through a few fundamental principles rather than exposing students to concepts through a series of derived equations. Through a qualitative, multiple case study research design, data were collected from multiple sources: non-participant observations, digitally recorded video, semi-structured interviews, TAs?? written reflections, and researchers?? field notes. The TAs?? PCK included three components: (a) knowledge of M&I curriculum goals, (b) knowledge of instructional strategies appropriate to the M&I course, and (c) knowledge of students?? learning. This study shows the complexity of adopting curriculum reforms and the necessity to support the faculty??s and TAs?? knowledge development when a novel science curriculum is adopted.     

Appraising the Qualities of Social Work Students’ Theoretical Knowledge: A Qualitative Exploration

Higher professional education aims to prepare students for entering practice with an adequate theoretical body of knowledge. In constructivist programmes, authentic learning contexts and self-directed learning are assumed to support knowledge learning and the transition from education to practice. Through an in-depth exploration, this case study aimed at defining and assessing the qualities of social work students?? theoretical knowledge at initial qualification. Participants were final-year bachelor??s students (n?=?18) in a constructivist professional programme of social work. Students?? knowledge concerning a real-life practical case was elicited through an interview and a form of concept mapping. A six-step procedure was used for a qualitative appraisal of students?? knowledge with the assistance of seven expert teachers. During this procedure an instrument for analysing knowledge qualities was developed, comprising 13 aspects representing four features of expert knowledge: extent, depth, structure, and critical control. Results showed that 13 students received high appraisals for their knowledge extent and depth. Only 4 students received high appraisals for knowledge structure and critical control. 5 Students who received overall lower appraisals seemed inhibited to show their knowledge qualities by preoccupations with self-concerns about their own professional role. Conclusion is that the majority of students needs more learning support for knowledge structure and critical control than offered by their constructivist programme. Further research is needed into the personal factors that influence students?? theoretical knowledge learning and which knowledge qualities can be reached by young adults in a 4?year educational programme.     

LONG-TERM OUTCOMES OF EARLY CHILDHOOD SCIENCE EDUCATION: INSIGHTS FROM A CROSS-NATIONAL COMPARATIVE CASE STUDY ON CONCEPTUAL UNDERSTANDING OF SCIENCE

The purpose of this research was to explore the long-term outcomes of either participating or not participating in early childhood science education on grade 6 students?? conceptual understanding of science. The research is situated in a conceptual framework that evokes Piagetian developmental levels as both potential curriculum constraints and potential models of efficacy. The research design was a multiple case study of grade 6 children from 3 schools in China (n?=?140) who started formal science education in the third grade and grade 6 children from 3 matched schools in Australia (n?=?105) who started learning science in kindergarten. The students?? understanding was assessed by a science quiz and an in-depth interview. The data showed that participating children from the high socioeconomic schools in China and Australia had similar understandings of science. Divergence between the medium and low socioeconomic schools, however, indicated that the grounding in early childhood science education in Australia may have placed these children at an advantage. Alternative explanations for the divergence, including the nature of classroom instruction in the two countries, are discussed.     

Academic Success in Context-Based Chemistry: Demonstrating fluid transitions between concepts and context

Curriculum developers and researchers have promoted context-based programmes to arrest waning student interest and participation in the enabling sciences at high school and university. Context-based programmes aim for student connections between scientific discourse and real-world contexts to elevate curricular relevance without diminishing conceptual understanding. This interpretive study explored the learning transactions in one 11th grade context-based chemistry classroom where the context was the local creek. The dialectic of agency/structure was used as a lens to examine how the practices in classroom interactions afforded students the agency for learning. The results suggest that first, fluid transitions were evident in the student–student interactions involving successful students; and second, fluid transitions linking concepts to context were evident in the students' successful reports. The study reveals that the structures of writing and collaborating in groups enabled students' agential and fluent movement between the field of the real-world creek and the field of the formal chemistry classroom. Furthermore, characteristics of academically successful students in context-based chemistry are highlighted. Research, teaching, and future directions for context-based science teaching are discussed.     

Making Connections: Learning and Teaching Chemistry in Context

Even though several studies have reported positive attitudinal outcomes from context-based chemistry programs, methodological obstacles have prevented researchers from comparing satisfactorily the chemistry-learning outcomes between students who experience a context-based program with those who experience a content-driven program. In this narrative inquiry we are able to address the question: how do the recalled experiences of a student and her teacher in context-based and concept-based chemistry programs compare? From the student’s unique perspective of experiencing both programs with the same teacher, we have constructed our collective account around four themes; namely, the extent to which the student makes connections between chemistry concepts and real-world contexts, developing research independence through engaging in extended experimental investigations related to contexts, learning chemistry concepts through contexts, and conceptual sequencing in a context-based program. The student reported real-world connections between chemistry concepts and contexts, found her engagement in the context-driven tasks interesting and productive, and identified connected sequences of concepts across the contexts studied. Despite difficulties for teachers who are required to shift pedagogies, the student’s lived experiences and outcomes from a context-based program provide some encouragement in working through these issues.     

Project Clarion: Three Years of Science Instruction in Title I Schools among K-Third Grade Students

The purpose of the study was to measure the effects of higher level, inquiry-based science curricula on students at primary level in Title I schools. Approximately 3,300 K-3 students from six schools were assigned to experimental or control classes (N?=?115 total) on a random basis according to class. Experimental students were exposed to concept-based science curriculum that emphasized ??deep learning?? though concept mastery and investigation, whereas control classes learned science from traditional school-based curricula. Two ability measures, the Bracken Basic Concept Scale-Revised (BBCS-R, Bracken 1998) and the Naglieri Nonverbal Intelligence Test (NNAT, Naglieri 1991), were used for baseline information. Additionally, a standardized measure of student achievement in science (the MAT-8 science subtest), a standardized measure of critical thinking, and a measure for observing teachers?? classroom behaviors were used to assess learning outcomes. Results indicated that all ability groups of students benefited from the science inquiry-based approach to learning that emphasized science concepts, and that there was a positive achievement effect for low socio-economic young children who were exposed to such a curriculum.     

Using model-based scaffolds to support students solving context-based chemistry problems

ABSTRACT

Context-based learning aims to make learning more meaningful by raising meaningful problems. However, these types of problems often require reflection and thinking processes that are more complex and thus more difficult for students, putting high demands on students’ problem-solving capabilities. In this paper, students’ approaches when solving context-based chemistry problems and effects of systematic scaffolds are analysed based on the Model of Hierarchical Complexity. Most answers were initially assigned to the lowest level of the model; higher levels were reached without scaffolds only by few students and by most students with scaffolds. The results are discussed with regard to practical implications in terms of how teachers could make use of context-based tasks and aligned scaffolds to help students in this activity.     

Textbook Questions in Context-Based and Traditional Chemistry Curricula Analysed from a Content Perspective and a Learning Activities Perspective

In this study, questions in context-based and traditional chemistry textbooks were analysed from two perspectives that are at the heart of chemistry curricula reforms: a content perspective and a learning activities perspective. To analyse these textbook questions, we developed an instrument for each perspective. In total, 971 textbook questions were analysed. Textbook questions in context-based and traditional curricula appeared to differ significantly in their orientation on content and in the activation to engage students in certain learning activities. Although traditional curricula included more questions that stress traditional chemistry content and included more reproductive chemistry questions than context-based curricula, they were not always as traditional as we had expected. Context-based chemistry curricula focused more on chemistry content relating to societal/technological issues and chemistry theory development and also more questions were included that activate students to regulate their own learning. However, context-based chemistry curricula still included a considerable amount of traditional chemistry content and did not focus as much on higher order learning as we had expected. The developed instruments might be helpful in chemistry curricula design to gain insights into the content which is stressed and how students are activated by textbook questions to engage in learning.     

化学专业药用高分子材料学教学改革初探

药用高分子材料学是高分子科学、药学、临床医学等学科融合而成的一种交叉性学科,目前已进入化学专业本科教学课程体系。针对化学专业药用高分子材料学教学中遇到的相关问题,要从改革课程教学模式入手,提高学生的学习积极性、主动性和创造性,进而提升教学质量。     

Fascinating organic molecules from nature

From the very beginning of civilization, humans have used chemicals from Nature ?? most of them comparatively small organic molecules now designated as secondary metabolites ?? for a variety of purposes such as pigments and dyes, arrow and fish poisons and olfactory stimulants. It is no wonder that many eminent chemists were attracted to these materials to elucidate the underlying chemistry. Willstatter, Baeyer, Richard Kuhn, Karrer, Robinson and others made pioneering studies and isolated several new compounds which were included in the curriculum of earlier days. Another pioneer, A G Perkin, second son of Sir W H Perkin, was, according to his elder brother, W H Perkin, Jr, a dabhand with natural dyes.He andAE Everest wrote a book The Natural Organic Colouring Matters, first published in 1918, which was like a Bible to natural product chemists of yesteryears. (You can now read it on line!). As organic chemistry progressed, making leaps and bounds, the newer exciting discoveries gradually pushed the study of several of these compounds out of the curriculum. While one can understand this trend, one also feels sad that students these days are not aware of several interesting facets of natural products chemistry which link organic chemistry with folklore, traditional practices by diverse native communities, indigenous systems of medicine and current ideas of chemical structure and reactivities. It is not possible to fill in these gaps in textbooks which are designed to cater to the needs of students preparing for various university examinations, but articles such as those contemplated here can provide students with knowledge that can be stimulating, interesting as well as enjoyable! We begin the series with ??some exotic red pigments of plant origin??. Several red coloured dyes and pigments of vegetable origin have been known to mankind ever since the dawn of civilization. Their varied uses have been mentioned in ancient literature, including the Ramayana, folklores, travelogues and accounts of several explorers. Their chemistry is equally fascinating and has attracted the attention of a number of eminent organic chemists. In this article, we examine a few of these pigments isolated from plant materials found in different parts of the world. They include the pigments of the red sandalwood, the colourants of safflower, the exotic cosmetic chica red, brazilin from the Brazil wood (and the related hematoxylin), the compounds from the Dragon??s blood, the sesquiterpene quinones of the Miro wood and rottlerin, the main red pigment of Kamala dye.     

Promoting inclusive education, civic scientific literacy, and global citizenship with videogames

In this response to Yupanqui Munoz and Charbel El-Hani??s paper, ??The student with a thousand faces: From the ethics in videogames to becoming a citizen??, we examine their critique of videogames in science education. Munoz and El-Hani present a critical analysis of videogames such as Grand Theft Auto, Street Fight, Command and Conquer: Generals, Halo, and Fallout 3 using Neil Postman??s (1993) conceptualization of technopoly along with Bill Green and Chris Bigum??s (1993) notion of the cyborg curriculum. Our contention is that these games are not representative of current educational videogames about science, which hold the potential to enhance civic scientific literacy across a diverse range of students while promoting cross-cultural understandings of complex scientific concepts and phenomenon. We examine games that have undergone empirical investigation in general education science classrooms, such as River City, Quest Atlantis, Whyville, Resilient Planet, and You Make Me Sick!, and discuss the ways these videogames can engage students and teachers in a constructivist dialogue that enhances science education. Our critique extends Munoz and El-Hani??s discussion through an examination of the ways videogames can enhance science education by promoting inclusive education, civic scientific literacy, and global citizenship.     

The role of authentic teaching cases and mastery approach goals in online pre-service teachers’ self-regulated learning

Instructional methods in higher education are changing in response to the growing popularity for distance learning courses. Investigating methods of instruction that will assist in the manner that coursework is taught in online courses is therefore a significant enterprise to research. Specifically, examining the relation between theory and practice in programs of teacher education where application is an integral part of the curriculum as well as students’ future career is of utmost importance. Instruction using the case study method enables instructors to involve their students with the realities of teaching using scenarios built around authentic educational dilemmas, where students can problem-solve varying outcomes and generate possible solutions from multiple theoretical viewpoints. Self-regulated learning has been consistently shown to be a fundamental component in the academic success of online learners. Existing research studies on distance learners has specifically shown mastery-approach goals to be predictive of self-regulated learning. This study found significant relationships between the use of authentic case studies in online preservice teaching, self-regulation, and mastery approach goals. Additionally, the results of this study also identified that the relationship between self-regulation and mastery approach goals was strengthened when using case studies that were authentic.

     

Engaging Students in Science Courses: Lessons of Change from the Arctic

Where you live should have something to do with what you teach. In the Arctic, the idea of place-based education – teaching and sharing knowledge that is needed to live well – is central to the UARCTIC consortium and the 4^th International Polar Year educational reform effort. A place-based issue oriented context can engage students in chemistry concepts when it intersects with their experience and lives. This article examines the rationale and means of integrating local concerns such as world view, culture, traditional knowledge, and policy into both general and specialized chemistry courses. More broadly, capacious placebased issues should be widely adapted by all curriculum reform efforts to demonstrate the connectivity between science and societal understanding of technological options. A case in point is the inclusion of indigenous perspectives in a non-majors general chemistry course when the concepts of scientific method, ice and water resources, genetic engineering, and so forth are discussed. In a specialized course on radioactivity in the north, topics connected nuclear chemistry and radioactivity to people and energy. The local landscape should be central to science courses and involve issues relevant to stewardship, a component of the indigenous world view. The historical issues can be connected to current nuclear energy and uranium mining as they relate to the risks and benefits for the local community. This article will make the case that curriculum reform that focuses on real-world topics will not only engage students so that they perform well in class but also spark their interest so that they continue learning after the course is over.     

Verbal Final Exam in Introductory Biology Yields Gains in Student Content Knowledge and Longitudinal Performance

We studied gains in student learning over eight semesters in which an introductory biology course curriculum was changed to include optional verbal final exams (VFs). Students could opt to demonstrate their mastery of course material via structured oral exams with the professor. In a quantitative assessment of cell biology content knowledge, students who passed the VF outscored their peers on the medical assessment test (MAT), an exam built with 40 Medical College Admissions Test (MCAT) questions (66.4% [n = 160] and 62% [n = 285], respectively; p < 0.001);. The higher-achieving students performed better on MCAT questions in all topic categories tested; the greatest gain occurred on the topic of cellular respiration. Because the VF focused on a conceptually parallel topic, photosynthesis, there may have been authentic knowledge transfer. In longitudinal tracking studies, passing the VF also correlated with higher performance in a range of upper-level science courses, with greatest significance in physiology, biochemistry, and organic chemistry. Participation had a wide range but not equal representation in academic standing, gender, and ethnicity. Yet students nearly unanimously (92%) valued the option. Our findings suggest oral exams at the introductory level may allow instructors to assess and aid students striving to achieve higher-level learning.