Richard K. Coll

The role of models/and analogies in science education: implications from research

Models and modelling are key tools for scientists, science teachers and science learners. In this paper we argue that classroom‐based research evidence demonstrates that the use of models and analogies within the pedagogy of science education may provide a route for students to gain some understanding of the nature of science. A common theme to emerge from the literature reviewed here is that in order to successfully develop conceptual understandings in science, learners need to be able to reflect on and discuss their understandings of scientific concepts as they are developing them. Pedagogies that involve various types of modelling are most effective when students are able to construct and critique their own and scientists’ models. Research also suggests that group work and peer discussion are important ways of enhancing students’ cognitive and metacognitive thinking skills. Further we argue that an understanding of science models and the modelling process enables students to develop a metacognitive awareness of knowledge development within the science community, as well as providing the tools to reflect on their own scientific understanding.

Perceptions of desirable graduate competencies for science and technology new graduates

Work‐integrated learning (WIL) programmes that combine on‐campus classroom‐based study with off‐campus authentic work experience are a growing area of interest internationally. Despite widespread practice of WIL, there are few reports that shed light on appropriate pedagogies for the work experience in particular. As with any form of education, providers hold certain views as to desirable outcomes in terms of graduate profiles and of desirable graduate competencies. A complication for multi‐party WIL programmes is that educational stakeholders (e.g., staff working in tertiary education provider institutions and employers) may hold different views as to desirable graduate competencies. Here we argue that an understanding of stakeholder views of desirable graduate competencies is an essential prerequisite of pedagogical design. The research reported here is an intrinsic case study and comprised an investigation of perceptions of 24 desirable graduate competencies for new science and technology graduates entering the workforce both today, and in ten years’ time. Stakeholders for four sector stakeholder groups (n = 458): undergraduate students (n = 71), recent graduates (n = 143), employers of graduates (n = 172), and faculty (n = 72), were surveyed using a previously reported and validated instrument. The research findings suggest that science and technology stakeholders see all 24 competencies as desirable, and see the importance of all skills and some skills in particular as likely to increase in ten years’ time. Despite emphasis on cognitive and technical skills (often termed ‘hard’ skills), the single most desirable skill is ability and willingness to learn, a behavioural skill (often termed ‘soft’ skills). It is proposed that classroom‐based instruction is unlikely to produce graduates with the desired skills, and that work‐integrated learning may have a role to play in the development of graduate competencies.

Zoos as a Source of Free Choice Learning.

This paper reports on an inquiry into the use of zoos as a source of informal or free choice learning. The study was contexualised within the zoos environmental enrichment programme (an animal husbandry principle that seeks to develop species-typical behaviour for captive animals by using naturalistic enclosures or artificial items that stimulate animal interest). Visitor perceptions and actual use of the zoo were investigated using structured interviews based on an interview protocol that elicited their perspectives of the nature and character of zoo settings including the use of photographs of selected exhibits to induce stimulated recall. These data were triangulated with unobtrusive observation at the same exhibits (Bitgood et al., 1988). The visitors spent little time at a given exhibit, and rated the more naturalistic or enriched exhibits more favourably, but older visitors seemed less concerned with naturalness of exhibits. The zoo considers that it has an important role in education and provides many opportunities for learning for both general visitors and school groups. Both general visitors and school groups reported that the prime purpose of their visit was for entertainment. It appears learning of science at the zoo is limited for general visitors, however, the learning of science for school children is enhanced by pre- and post-visit activities and strong curricula links.

Assessment of learning, for learning, and as learning: New Zealand case studies

Research about the benefits of formative assessment as a means of improving student learning has encouraged policy‐makers and teachers in countries like the UK, Australia and New Zealand to promote and use classroom‐based assessment for learning in the qualifications arena. However, recent research suggests teachers are implementing a narrow interpretation of formative assessment in classrooms using techniques that focus on assessment procedures and practices to assure students comply with criteria and achieve awards for external qualifications. This variation on ‘teaching to the test’ has led to the coining of the phrase ‘assessment as learning’ to indicate the instrumentalism that results from such restricted practice. This paper reports on findings from case studies of two schools in New Zealand where secondary school students are learning how to perform science investigations under direction, for a curriculum standard that is a component of a national standards‐based qualification. The findings reveal that students’ assessment and learning experiences reflect the emerging international trend of ‘assessment as learning’, but strategies for redressing some of the undesirable aspects of this limiting form of formative assessment in this New Zealand context are identified.

Student Experiences of Carrying out a Practical Science Investigation Under Direction

This paper reports on the reality of classroom‐based inquiry learning in science, from the perspectives of high school students and their teachers, under a national curriculum attempting to encourage authentic scientific inquiry (as practiced by scientists). A multiple case study approach was taken, utilising qualitative research methods of unobtrusive observation, semi‐structured interviews and document analysis. The findings showed purposeful and focused learning occurring, but students were acquiring a narrow view of scientific inquiry where the thinking was characteristically rote and low‐level. The nature of this learning was strongly influenced by curriculum decisions made by classroom teachers and science departments in response to the assessment requirements of a high stakes national qualification. As a consequence of these decisions, students experienced structured teaching programmes in which they were exposed to programme content that limited the range of methods that scientists use to fair testing and to pedagogies that were substantially didactic in nature. In addition, the use of planning templates and exemplar assessment schedules tended to reduce student learning about experimental design to an exercise in “following the rules” as they engaged in closed rather than open investigations. Thus, the resulting student learning was mechanistic and superficial rather than creative and critical, counter to the aims of the national curriculum policy that is intent on promoting students’ knowledge and capabilities in authentic scientific inquiry.

A review of chemical bonding studies: needs, aims, methods of exploring students’ conceptions, general knowledge claims and students’ alternative conceptions

The present paper presents a detailed thematic review of chemical bonding studies. To achieve this, a matrix is developed to summarize and present the findings by focusing on insights derived from the related studies. The matrix incorporates the following themes: needs, aims, methods of exploring students’ conceptions, general knowledge claims, students’ alternative conceptions, implications and recommendations for teaching and learning, implications for curriculum development and suggestions for future research. The general knowledge claims investigated in this paper are: (a) student alternative conceptions and level of education; (b) studies of student understanding of covalent bonding; (c) studies of student understanding of ionic bonding; (d) studies of student understanding of metallic bonding; (e) studies of student understanding of intermolecular forces; (f) studies of student understanding of chemical bonds, energetics and other underlying theories; (g) student use of anthropomorphic language and analogies; (h) students’ mental models for chemical bonding; and (i) enhancing students’ conceptual understanding.

An Application of the Questionnaire on Teacher Interaction and College and University Classroom Environment Inventory in a Multicultural Tertiary Context

The research reported in this inquiry consisted of the application of two classroom learning environment questionnaires developed in a Western context to a culturally diverse context, namely, the Pacific Islands. The College and University Classroom Environment Inventory (CUCEI) and Questionnaire on Teacher Interaction (QTI) instruments were administered to intact classes of first- and second-year science students ( n= 257) at a regional university in the Pacific Islands, containing a total of 12 ethnicities. The data reveal that the QTI instrument holds good reliability for all scales, whereas the CUCEI holds reliability for only two scales. This may be due to the simple nature of the questions on the QTI whereas the questions on the CUCEI require more interpretation, the latter exacerbated by the fact that English is a second or third language for most participants. Surprisingly, there were few differences in perceptions of teacher student interaction based on ethnicity, but substantial differences based on gender. As reported in previous classroom environment research at the secondary school level, in this study, females perceived their environment more favourably than males. The data for the QTI reveal that the students perceive their classrooms to be highly teacher dominated, consistent with previous naturalistic studies of secondary schools and exploratory studies at the tertiary level in Fiji. Since almost all the graduates from this institution become science teachers, a cycle is completed.

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.

The influence of normative beliefs on students’ enrolment choices

Peers, family, mentors and the media may influence students’ attitudes towards chemistry and their intention to enrol in tertiary chemistry courses. In this paper we report on an investigation of the perceptions students hold about their associates’ attitudes towards chemistry and chemists. Data were gathered from interviews with 37 tertiary chemistry students, for whom chemistry had differing roles in their degree. The data suggest that although many of the students’ associates subscribe to stereotypical images of chemistry and chemists, students’ choices of enrolment are predominantly based on their own previous experiences.

Modeling and the Future of Science Learning

Models and modeling are of such importance in science that the appropriate un-derstanding of, and ability to use, models is seen by many authors as central to an under-standing of science (Gilbert & Boulter, 1998; Harrison & Treagust, 2000; Ramadas, 2009). In this chapter we consider key aspects of models and modeling. We begin by de-scribing the nature of models and modeling. We then discuss how models and modeling relate to the nature of science and scientific enquiry. This followed by a description of modeling as a cognitive tool and consideration of how models and modeling relate to the learning of science. We conclude the chapter by highlighting the areas of needed research in science education with respect to models and modeling.