General system theory: Toward a conceptual framework for science and technology education for all

In this paper we suggest using general system theory (GST) as a unifying theoretical framework for science and technology education for all. Five reasons are articulated: the multidisciplinary nature of systems theory, the ability to engage complexity, the capacity to describe system dynamics and change, the ability to represent the relationship between the micro-level and macro-level of analysis, and the ability to bring together the natural and human worlds. The historical origins of system ideas are described, and the major concepts of system theory are mapped; including the mathematical, technological, and philosophical constructs. The various efforts to implement system thinking in educational contexts are reviewed, and three kinds of learning environments are defined: expert presentation, simulation, and real-world. A broad research agenda for exploring and drawing-out the educational implications of system thinking and learning is outlined. The study of both real-world and simulated learning environments is advocated.     

Changes in primary science over the past decade: Implications for the research community

During the early 1980s in Australia there was a new wave of expectancy about primary science as new curricula were being considered or introduced and research findings were beginning to identify new directions for both teaching and research. In an expression of this, six authors were invited to present papers to a symposium on primary science held in 1984 to address the question: “What do you believe should be the state of primary science (in Australia) in 1995 and what are the steps which need to be taken to achieve the desired state?” This study set out to identify what had been said at that time, to compare that with actual developments, and to identify possible future directions for research. Relevant publications includingResearch in Science Education were analysed as a means of comparing what had happened since 1984 with the hopes of those authors. It was only in the latter half of the decade that some of the scenarios painted by the authors in 1984 began to emerge. A key implication for the research community drawn from the analysis shows that science education researchers have tended to neglect working in collaboration with education departments and authorities for the improvement of primary science education.     

Simians in the Shape School: A comparative study of executive attention

Executive functions (EF) have been studied extensively in children and adults. However, EF tasks for young children can be difficult to administer and interpret. Espy (1997, Developmental Neuropsychology, 13, 495–499) designed the Shape School task to measure inhibition and switching in preschool-aged children. Shape School presents cartoon-like characters that children must flexibly name by their color, their shape, or both, depending on cues that indicate the appropriate rule. Shape School has been found to be age sensitive as well as predictive of performance on other EF tasks. We presented a computerized analogue of Shape School to seven rhesus macaques. Monkeys were trained to categorize characters by color or shape, or to inhibit this response, depending on whether the characters had eyes open, eyes closed, or wore hats. Monkeys performed above chance on the inhibition and switching components of the task. Long runs of a single classification rule and long runs of noninhibition trials had no significant impact on performance when the rule changed or inhibition was required. This nonverbal adaptation of Shape School can measure EF in nonhuman animals and could be used in conjunction with other EF tasks to provide a clearer picture of both human and nonhuman executive functions.     

Activity Theory,Mediated Action and Literacy: Assessing how children make meaning in multiple modes

The paper reports a study into children's literacy in Bangladesh. It presents reading and writing profiles of a stratified random sample of ten year-old children. The paper argues that while these profiles might be a valuable source of information for the Government of Bangladesh as well as for the international donor community, especially in that they provide diagnostic information of children's literacy development, they do not portray fully the potential of children as meaning-makers. A small number of children from those who performed poorly in assessments of reading and writing were subjected to a further study in which they participated in a 'designing and making' activity. Here, the multiple modes through which children communicated meaning and understanding became the focus of the assessment. This means that we did not look solely at the linguistic mode but focused also on 'mediated action' as a mode through which meaning is made. Thus the potential of children to represent meaning and to create and shape 'new' texts through collaborative engagement with each other, as well as with the material and linguistic resources being used in the activity, became the prime focus of assessment. The paper shows that children who performed poorly on tests of reading and writing were potentially creative meaning-makers when other modes of representation like action and speech were considered. The paper concludes that large-scale studies of children's literacy are necessary and will continue to provide important sources of information for governments attempting to alleviate poverty and create equitable access to education and other social services. On the other hand, data obtained in this fashion mask the potential of children as creative meaning-makers. The study reported here shows that teacher-based assessment, expanded to recognise modes of meaning-making other than language, can be a vital, additional source of information for those interested in children as learners.     

Boxing clever: using shoeboxes to support home–school knowledge exchange

A key tenet of the Home–School Knowledge Exchange Project is that children's learning will be enhanced if the knowledge and experience that are to be found both at home and in school can be brought together. In this paper we explore ways of connecting home and school to support literacy learning at Key Stage 1, focusing on the home‐to‐school direction. We discuss how shoeboxes, filled with children's artefacts, can support a range of literacy‐related activities in school. It is suggested that the extensive diversity of knowledge and interests reflected in the chosen objects presents teachers with an invaluable opportunity to personalise children's literacy learning.     

Conceptual difficulties experienced by senior high school students of electrochemistry: Electrochemical (galvanic) and electrolytic cells

This research investigated students' understanding of electrochemistry following a 7–9-week course of instruction. A list of conceptual and propositional knowledge statements was formulated, and this provided the framework for semistructured interviews that were conducted with 32 students in their final year of high school chemistry, following instruction in electrochemistry. Three misconceptions identified in this study and five which have been reported earlier are incorporated into an alternative framework about electric current. The framework is grounded on the notion that a current always involves drifting electrons, even in solution. Another area where students' misconceptions were prevalent was in relation to the sign of the anode and cathode. Students who thought the anode was negatively charged believed cations would move toward it, and those who thought it was positively charged were unable to explain why electrons move away from it. Electrolytic cells also proved troublesome for students. Many students did not associate the positions of the anode and cathode with the polarity of the applied electromotive force (e.m.f.). Other students attempted to reverse features of electrochemical cells and apply the reversals to electrolytic cells. The implications of the research relate to students' interpretation of the language that is used to describe scientific phenomena and the tendency for students to overgeneralize, due to comments made by teachers or statements in textbooks.