Science and Language Integration in Elementary Classrooms: Instructional Enactments and Student Learning Outcomes     

Fazio  Xavier  Gallagher  Tiffany L. 《Research in Science Education》2019,49(4):959-976

Research in Science Education - While some students will pursue careers in science, all will engage with multimodal science-based texts. The effective use of language skills is essential to support...  相似文献   

The different impact of a structured peer-assessment task in relation to university undergraduates’ initial writing skills     

Marta Ramon-Casas  Neus Nuño  Ferran Pons  Toni Cunillera 《Assessment & Evaluation in Higher Education》2019,44(5):653-663

This article presents an empirical evaluation of the validity and reliability of a peer-assessment activity to improve academic writing competences. Specifically, we explored a large group of psychology undergraduate students with different initial writing skills. Participants (n?=?365) produced two different essays, which were evaluated by their course peers and professors using a specific grading instrument (rubric). The validity of the task was demonstrated by a high inter-grader agreement and a strong degree of consistency between the ratings of the peers and professors. Although all students did not improve their writing skills between their first and second essays, the peer-assessment activity enhanced the writing abilities of low but not high-achieving participants. The pedagogical implications of these results are discussed.  相似文献   

Antioxidant diet supplementation enhances aerobic performance in amateur sportsmen     

Aguiló A  Tauler P  Sureda A  Cases N  Tur J  Pons A 《Journal of sports sciences》2007,25(11):1203-1210

The effects of antioxidant diet supplements on blood lactate concentration and on the aerobic and anaerobic thresholds and their adaptations to training were analysed. Fifteen amateur male athletes were randomly assigned to either a placebo group or an antioxidant-supplemented group (90 days supplementation with 500 mg x day(-1) of vitamin E and 30 mg x day(-1) of beta-carotene, and the last 15 days also with 1 g x day(-1) of vitamin C). Before and after the antioxidant supplements, the sportsmen performed a maximal exercise test on a cycle ergometer and maximal and submaximal physiological parameters were assessed together with blood lactate concentration. Maximal oxygen uptake (VO(2max)), maximal blood lactate concentration, and the maximal workload attained rose significantly in both groups after the 3 months of training. At the end of the study, maximal blood lactate concentration was lower in the group that took supplements than in the placebo group. The percentage of VO(2max) attained at the anaerobic threshold rose significantly in both groups after 3 months of training, although the final value in the supplemented group was higher than that in the placebo group. Antioxidant diet supplements induced lower increases in blood lactate concentration after a maximal exercise test and could improve the efficiency in which aerobic energy is obtained.  相似文献   

Review Essay     

Rambla Xavier 《International Studies in Sociology of Education》2013,23(2):187-192

Che Guevara, Paulo Freire and the Pedagogy of Revolution, P. McLAREN, 2000, Lanham: Rowman & Littlefield, 220 pp., ISBN 08477695336, $17.61  相似文献   

European Museum reports     

Xavier Perrot 《Archives and Museum Informatics》1994,8(2):124-129

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Standards notes     

Xavier Perrot 《Archives and Museum Informatics》1994,8(1):84-88

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European museum reports     

Xavier Perrot 《Archives and Museum Informatics》1994,8(3):217-226

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Broadband Utilization in Space: Effects of Population and Economic Structure     

Jacint Jordana  Xavier Fernández  David Sancho  Yanina Welp 《The Information Society》2013,29(5):341-351

We examine the effect of public policy on the growth of Internet use. Using a decentralized country—Spain—as an example, we compare the 17 Spanish regions to test different Internet policy designs, taking into account the quality and number of specific programs promoted by regional governments, as well as the presence or absence of strategic planning in each region. We treat the percentage of Internet users as a dependent variable to compare its diffusion in different territories. Our findings show that educational levels and economic differences explain about half of the variations observed. Furthermore, the regional policies play a significant role in explaining regional variations. We investigate which public policy instruments are more significant for the development of the Internet, and find that focused policy intervention and complex policy initiatives are more significant than other policy instruments in explaining the increase in the percentage of Internet users.  相似文献   

Misconceptions About Sound Among Engineering Students     

Arcadi Pejuan  Xavier Bohigas  Xavier Jaén  Cristina Periago 《Journal of Science Education and Technology》2012,21(6):669-685

Our first objective was to detect misconceptions about the microscopic nature of sound among senior university students enrolled in different engineering programmes (from chemistry to telecommunications). We sought to determine how these misconceptions are expressed (qualitative aspect) and, only very secondarily, to gain a general idea of the extent to which they are held (quantitative aspect). Our second objective was to explore other misconceptions about wave aspects of sound. We have also considered the degree of consistency in the model of sound used by each student. Forty students answered a questionnaire including open-ended questions. Based on their free, spontaneous answers, the main results were as follows: a large majority of students answered most of the questions regarding the microscopic model of sound according to the scientifically accepted model; however, only a small number answered consistently. The main model misconception found was the notion that sound is propagated through the travelling of air particles, even in solids. Misconceptions and mental-model inconsistencies tended to depend on the engineering programme in which the student was enrolled. However, students in general were inconsistent also in applying their model of sound to individual sound properties. The main conclusion is that our students have not truly internalised the scientifically accepted model that they have allegedly learnt. This implies a need to design learning activities that take these findings into account in order to be truly efficient.  相似文献   

Pedagogising poverty alleviation: a discourse analysis of educational and social policies in Argentina and Chile     

Xavier Rambla  Antoni Verger 《British Journal of Sociology of Education》2012,33(6)

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