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91.
In this article, we propose that guiding teachers to examine the regulative/discursive norms of school mathematics with tools derived from social semiotics can serve two related goals: (1) to deconstruct the “math is math period!” disposition in prospective teachers by promoting their critical understanding of the symbolic domination work they often unknowingly perform and (2) to reconstruct a more socio-political disposition by equipping them with tools for decoding the dominant discursive practices of school mathematics. After reviewing research on the social semiotics of mathematics education, we discuss two sample teacher education tasks designed with the above goals in mind. 相似文献
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93.
Gerfeson Mendonça Alex Antonio Florindo Cassiano Ricardo Rech Delma Katiana Silva de Freitas José Cazuza de Farias Júnior 《Journal of sports sciences》2018,36(9):1068-1075
Little is known about the association between environmental characteristics and types of physical activity in adolescents in a Latin American context. The aim of this study was to examine the association between perceived neighborhood environmental characteristics and different types of physical activity in 2,874 adolescents from Joao Pessoa, Paraiba State, Northeastern Brazil. The types of activity measured by questionnaire (≥10 min/day) included sports, physical exercises, active commuting and recreational activities. Neighborhood characteristics were measured by a 15-item scale. Multilevel analyses showed that adolescents who reported “having places they liked to go to” (OR = 1.41; 95%CI: 1.10–1.79) and “places with opportunities to practice” (OR = 1.29; 95%CI: 1.01–1.65) were more likely to play sports. “Seeing interesting things while walking” (OR = 1.24; 95%CI: 1.01–1.53) and “Seeing other adolescents engaged in physical activity” (OR = 1.47; 95%CI: 1,05–2,06) were associated with exercises. “Seeing other adolescents engaged in physical activity” (OR = 1.47; 95%CI: 1.18–1.82), “the neighborhood is not violent” (OR = 1.29; 95%CI: 1.04–1.60) and “having places they like to go to” (OR = 1.59; 95%CI: 1.13–2.25) were positively associated and “places with opportunities to practice” (OR = 0.79; 95%CI: 0.63–0.98) inversely related to active commuting. “Seeing other adolescents engaged in physical activities” (OR = 1.31; 95%CI: 1.05–1.63) and “seeing interesting things while walking” (OR = 1.26; 95%CI: 1.02–1.56) were associated with recreational activities. Neighborhood environmental characteristics associated with the physical activity vary with the type of practices adopted by adolescents. 相似文献
94.
Eunice Lerma Manuel X. Zamarripa Marvarine Oliver Javier Cavazos Vela 《Counselor Education & Supervision》2015,54(3):162-175
Through 23 open‐ended questionnaires and 8 individual interviews, this phenomenological study explored the experiences of Hispanic men and women (N = 23) who completed doctoral degrees in counselor education. Six themes were identified: family role models, educational support, parental expectations, ethnic identity, acculturation/cultural expectations, and intrinsic motivation. 相似文献
95.
Catarina Schreck Reis Hélia Marchante Helena Freitas 《International Journal of Science Education》2013,35(4):690-712
Invasive species are one of the main threats to biodiversity worldwide. Even though they are identified and recognized as such by the Portuguese law, the majority of the population is not yet aware of this problem. Aiming to increase awareness about biological invasions among young students, a workshop on Invasive Plant Species was organized at the Botanical Museum of the University of Coimbra. A total of 170 teenager students from five schools participated in the workshop. Three activities were prepared, focusing on: (1) identification of invasive plants, (2) competition between native and invasive plants and (3) control of invasive plants. One year later, questionnaires were sent to the participants, aiming to appraise workshop effectiveness, and this questionnaire revealed that these students know more about invasive plant species than a comparable group of students that did not participate in the workshop. The results clearly showed that practical informal education activities may be effective in raising public awareness. Questionnaires were essential to evaluate the knowledge acquired and retained by the students during the workshop. 相似文献
96.
Eunice Eyitayo Olakanmi 《Journal of Science Education and Technology》2017,26(1):127-137
This study establishes the effects of a flipped classroom model of instruction on academic performance and attitudes of 66 first-year secondary school students towards chemistry. A pre-test and post-test experimental design was employed to assign students randomly into either the experimental or control group. In order to assess the suitability of using flipped model of instruction, students were divided in two groups. For the first group called the experimental group, a “flipped classroom” was used in which the students were given video lessons and reading materials, before the class to be revised at home. On the other hand, the second group followed traditional methodology, and it was used as control. The rate of reaction knowledge test and the chemistry attitude scale were administered. In addition, the researcher documented classroom observations, experiences, thoughts and insights regarding the intervention in a journal on a daily basis in order to enrich the data. Students were interviewed at the end of the research in order to enrich the qualitative data also. Findings from this study reveal that the flipped instruction model facilitates a shift in students’ conceptual understanding of the rate of chemical reaction significantly more than the control condition. Positive significant differences were found on all assessments with the flipped class students performing higher on average. Students in the flipped classroom model condition benefited by preparing for the lesson before the classes and had the opportunity to interact with peers and the teacher during the learning processes in the classroom. The findings support the notion that teachers should be trained or retrained on how to incorporate the flipped classroom model into their teaching and learning processes because it encourages students to be directly involved and active in the learning. 相似文献
97.
The results are described of two case studies on the conceptions and classroom practice of two Portuguese physics and chemistry teachers on the role of problem solving in the teaching/learning of science. One of these teachers was a novice and the other had about 20 years of teaching experience. The data were obtained from a questionnaire, a semi-structured interview, classroom observation, personal documents, and stimulated recall. The analysis was carried out with instruments organised into categories and specific indicators. The results showed there to be major differences between the intention behind the new curricula, the teachers' conceptions, and their practice. Some suggestions are put forward on the basis of these results for the initial and ongoing education of secondary education teachers of physics and chemistry in Portugal. 相似文献
98.
Parents’ and teachers’ beliefs about children’s school readiness in a high-need community 总被引:1,自引:0,他引:1
Chaya S. Piotrkowski Michael Botsko Eunice Matthews 《Early childhood research quarterly》2000,15(4):537
This study compared the beliefs of preschool teachers, kindergarten teachers, and parents in one mostly Hispanic and Black high-need urban school district to learn their views of what children should know and be able to do at kindergarten entry. Beliefs regarding the importance of 12 school readiness “resources” were assessed with the CARES survey designed for this study. Parents held remarkably similar beliefs, regardless of ethnicity or education. Parents and teachers also agreed that children must be healthy and socially competent, and be able to comply with teacher authority, although parents rated this latter resource higher. However, parents rated all classroom-related readiness resources as more important than teachers did. They believed it was necessary for a child to be able to communicate in English and to have basic knowledge and skills, which was more important than a child’s approach to learning. Preschool teachers also believed that knowledge was more important than kindergarten teachers did. Directions for further research and implications for policy and practice are discussed. 相似文献
99.
Gaston P. Beunen† Robert M. Malina Duarte L. Freitas Martine A. Thomis José A. Maia Albrecht L. Claessens 《Journal of sports sciences》2013,31(15):1683-1691
Abstract The purpose of this study was to validate and cross-validate the Beunen-Malina-Freitas method for non-invasive prediction of adult height in girls. A sample of 420 girls aged 10–15 years from the Madeira Growth Study were measured at yearly intervals and then 8 years later. Anthropometric dimensions (lengths, breadths, circumferences, and skinfolds) were measured; skeletal age was assessed using the Tanner-Whitehouse 3 method and menarcheal status (present or absent) was recorded. Adult height was measured and predicted using stepwise, forward, and maximum R 2 regression techniques. Multiple correlations, mean differences, standard errors of prediction, and error boundaries were calculated. A sample of the Leuven Longitudinal Twin Study was used to cross-validate the regressions. Age-specific coefficients of determination (R 2) between predicted and measured adult height varied between 0.57 and 0.96, while standard errors of prediction varied between 1.1 and 3.9 cm. The cross-validation confirmed the validity of the Beunen-Malina-Freitas method in girls aged 12–15 years, but at lower ages the cross-validation was less consistent. We conclude that the Beunen-Malina-Freitas method is valid for the prediction of adult height in girls aged 12–15 years. It is applicable to European populations or populations of European ancestry. 相似文献
100.