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161.
Engaging teacher education as cultural work positions teacher educators and pre-service teachers as cultural workers. Cultural workers foreground the cultural complexities of their situated experiences while aiming to produce cultures that transform prevailing inequalities and injustices in public education. Doctoral students are also cultural workers translating the world of academia and their role in it as they learn to educate teacher candidates. How doctoral candidates engage in this cultural work depends greatly on the degree to which their faculty mentors are able to reveal the contradictions and opportunities for expansive learning that co-exist within schools of education and individual departments such as curriculum and learning. This article looks at this conundrum from the perspectives of a doctoral student and a senior faculty member.  相似文献   
162.
Research on multimedia learning has shown that learning is hampered when a multimedia message includes extraneous information that is not relevant for the task, because processing the extraneous information uses up scarce attention and working memory resources. However, eye-tracking research suggests that task experience might be a boundary condition for this negative effect of extraneous information on learning, because people seem to learn to ignore task-irrelevant information over time. We therefore hypothesised that extraneous information might no longer hamper learning when it is present over a series of tasks, giving learners the chance to adapt their study strategy. This hypothesis was tested in three experiments. In experiments 1a/1b, participants learned the definitions of new words (from an artificial language) that denoted actions, with matching pictures (same action), mismatching pictures (another action), or without pictures. Mismatching pictures hampered learning compared with matching pictures. Experiment 2 showed that task experience may indeed be a boundary condition to this negative effect on learning: the initial negative effect was no longer present when learners gained experience with the task. This suggests that learners adapted their study strategy, ignoring the mismatching pictures. That hypothesis was tested in experiment 3, using eye tracking. Results showed that attention to the pictures waned with task experience, and that this decrease was stronger for mismatching than for matching pictures. Our findings demonstrate the importance of investigating multimedia effects over time and in relation to study strategies.  相似文献   
163.
This study explored possible contributing factors to gastrointestinal distress, including endotoxemia, hyperthermia, dehydration and nutrition, during a 161-km ultramarathon. Thirty runners participated in the study and 20 finished the race. At three checkpoints and the finish, runners were interviewed to assess the incidence and severity of 12 gastrointestinal symptoms and to determine dietary intake. Core temperature was measured at the same locations. Runners were weighed pre-race, at the three checkpoints and the finish to monitor hydration status. Blood markers for endotoxemia (sCD14) and inflammation (interleukin-6 and C-reactive protein) were measured pre- and post-race. Gastrointestinal symptoms were experienced by most runners (80%), with nausea being the most common complaint (60%). Runners with nausea experienced significantly greater (P = 0.02) endotoxemia than those without nausea (sCD14 mean increase 0.7 versus 0.5 µg · mL?1). There was a significant positive correlation (r = 0.652, P = 0.005) between nausea severity and endotoxemia level. Inflammatory response, core temperature, hydration level and race diet were similar between runners with and without nausea. This study links endotoxemia to nausea in ultramarathon runners. Other possible contributing factors to nausea such as hyperthermia, dehydration and nutrition did not appear to play a role in the symptomatic runners in this study.  相似文献   
164.
ABSTRACT

South African schools are tasked with providing sexuality education through the Life Orientation curriculum as a means of challenging continued high rates of HIV, unwanted pregnancy and gender-based violence. While in theory schools are well positioned to provide appropriate knowledge for reproductive health and navigating sexual challenges within a gender justice framework, research on sexuality education in South African schools indicates that this is not the reality in practice. This paper draws on a growing body of qualitative studies, with both educators and learners in South African schools, to understand the issues undermining the goal of a critical and social justice pedagogy of sexuality in Life Orientation classrooms. We argue that sexuality education has been deployed to regulate and discipline young sexualities, reinforce and perpetuate gender binarisms and heteronormativity, re-establish global northern family values of the nuclear family within a pro-family discourse, and represent continued assumptions of adult authority in a civilising mission over young people. We suggest that the failure to make critical use of Life Orientation is linked to the dominance of ‘expert’-based didactic pedagogy, and argue the possibilities of sexuality education as a productive space for young people’s active participation and agency in making meaning of gender and sexualities.  相似文献   
165.
Couples making the transition to parenthood experience challenges that can threaten the quality and stability of their relationships and the health of family members. Currently, the educational infrastructure to support the delivery of couple-relationship education during the transition to parenthood is limited. Because new-parent couples interact with the health care system at many points during this transition time, an opportunity exists for strengthening couple relationships within the system to improve the well-being of adults and children. In this article, we propose a productive collaboration between marriage/couple educators and health care systems to integrate couple-relationship education into the standard of perinatal care.  相似文献   
166.
This paper examines the impacts of technology (e.g., Chromebooks, Google Drive) on teacher learning and student activity in the development and implementation of a deeply digital high school biology unit. Using design-based implementation research, teachers co-designed with researchers and curriculum specialists a student-centered unit aligned to the Next Generation Science Standards (NGSS) that utilizes classroom technology. Qualitative and quantitative data were collected to understand the barriers that inhibit the implementation of a digital curriculum as well as the extent that teachers engage in the design process and begin to make shifts in their practice. We found that through the co-design process teachers began to shift their knowledge of NGSS, technology implementation, and adapted to tensions and barriers inherent in the process.  相似文献   
167.
Cultural-historical activity theory (CHAT) approaches to intervention aim for transformative agency, that is, collective actions that expand and bring about new possibilities for activity. In this article, we draw on CHAT as a resource for organizing design research that promotes teachers’ agency in designing new science curriculum materials. We describe how CHAT informed our efforts to structure a collaborative design space in which teachers and other participants sought to develop new curriculum materials intended to help realize a new vision for science education. Specifically, we describe the tools and routines we deployed to support the design process, and we analyze the ways in which teachers took up elements of our design process as well as how they adapted, resisted, and suggested alternative tools and strategies to help develop new curriculum materials. In so doing, we illustrate ways in which CHAT can serve as a guide both for organizing collaborative design processes and for analyzing their efficacy.  相似文献   
168.
ABSTRACT

The prospect of enhancing ourselves through the use of new biotechnologies is for the most part, hypothetical. Nevertheless, the question of whether we should undertake such enhancement is worthy of discussion as it may become possible in the future. In this article, we consider one form of argument that conservative opponents of biotechnological means of enhancement (bioconservatives) deploy in opposition to the use of enhancement technologies—the backfiring objection. This is the objection that the use of such technologies is liable to go wrong and lead to outcomes that are inferior to the outcomes intended. We will argue that the objection is not nearly as significant as bioconservatives suppose it to be. Bioconservatives sometimes supplement the backfiring objection by arguing that change will be irreversible, that the new (or the unconventional) is especially liable to backfire and that humans possess severe and permanent limitations which cannot be overcome. We consider these ways of supplementing the backfiring objection and argue that each of them, when properly understood, is of limited value to the bioconservative. We also consider how traditional approaches to moral education can be supplemented by bioenhancement.  相似文献   
169.
Monitoring accuracy, measured by judgements of learning (JOLs), has generally been found to be low to moderate, with students often displaying overconfidence, and JOLs of problem solving are no exception. Recently, primary school children’s overconfidence was shown to diminish when they practised problem solving after studying worked examples. The current study aimed to extend this research by investigating whether practising problem solving after worked example study would also improve JOL accuracy in secondary education. Adolescents of 14–15 years old (N = 143) were randomly assigned to one of five conditions that differed in timing of JOLs, whether practice problems were provided, and timing of the practice problems provided: (1) worked examples – JOL, (2) worked examples – delay – JOL, (3) worked examples – practice problems – JOL, (4) worked examples – practice problems – delay – JOL or (5) worked examples – delay – practice problems – JOLs. Results showed that practice problems improved absolute accuracy of JOLs as well as regulation accuracy. No differences in final test performance were found.  相似文献   
170.
Instructional Science - The Productive Failure (PF) approach prompts students to attempt to solve a problem prior to instruction – at which point they typically fail. Yet, research on PF...  相似文献   
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