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Tori Kaster Faith L. Dooley John S. Fitzgerald Tanis J. Walch Madison Annandale Katia Ferrar 《Journal of sports sciences》2020,38(16):1913-1923
ABSTRACT
We estimated international/national temporal trends in sit-ups performance for children and adolescents, and examined relationships between national trends in sit-ups performance and national trends in health-related/sociodemographic indicators. Data were obtained by systematically searching studies reporting on temporal trends in sit-ups performance for apparently healthy 9–17 year-olds, and by examining nationally representative fitness datasets. Trends at the country-sex-age level were estimated by sample-weighted regression models relating the testing year to mean sit-ups performance. International/national trends were estimated by a post-stratified population-weighting procedure. Pearson’s correlations quantified relationships between national trends in sit-ups performance and national trends in health-related/sociodemographic indicators. A total of 9,939,289 children and adolescents from 31 countries/special administrative regions between 1964 and 2017 collectively showed a large improvement of 38.4% (95% CI: 36.8 to 40.0) or 7.1% per decade (95% CI: 6.8 to 7.4). Large international improvements were experienced by all age and sex groups, with the rate of improvement slowing from 1964 to 2000, stabilizing near zero until 2010, before declining. Trends differed between countries, with national trends in vigorous physical activity a strong, positive correlate of national trends in sit-ups performance. More sit-ups data are needed from low- and middle-income countries to better monitor trends in muscular fitness. 相似文献
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This study compared conversations among groups of teachers of high school geometry that had been elicited by a representation of instruction (either a video or an animation) and facilitated with an open-ended agenda. All artifacts used represented instruction scenarios that departed from what, according to prior work, had been hypothesized as normative. We used as the dependent variable the proportion of modal statements about instructional practice made by a group, which we argue is a good quantitative indicator that the statement appeals to the group’s knowledge of the norms of practice. Animations and videos produced similar proportion of modal statements, but the types of modal statements differed—with animations being associated with more statements of probability and obligation and videos being associated with more statements of inclination. Overall, the results suggest that animations are just as useful as videos in eliciting these sorts of orientational meanings. 相似文献
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We investigate experienced high school geometry teachers’ perspectives on “authentic mathematics” and the much-criticized
two-column proof form. A videotaped episode was shown to 26 teachers gathered in five focus groups. In the episode, a teacher
allows a student doing a proof to assume a statement is true without immediately justifying it, provided he return to complete
the argument later. Prompted by this episode, the teachers in our focus groups revealed two apparently contradictory dispositions
regarding the use of the two-column proof form in the classroom. For some, the two-column form is understood to prohibit a move like that shown in the video. But for others, the form is seen as a resource enabling such a move. These contradictory responses are warranted in competing but complementary notions, grounded on the corpus of
teacher responses, that teachers hold about the nature of authentic mathematical activity when proving.
相似文献
| Patricio HerbstEmail: |
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In this paper, we argue that to prepare pre-service teachers for doing complex work of teaching like leading classroom mathematics discussions requires an implementation of different pedagogies of teacher education in deliberate ways. In supporting our argument, we use two frameworks: one curricular and one pedagogical. The curricular framework is based on the work of Hammerness et al. (Preparing teachers for a changing world. What teachers should learn and be able to do. San Francisco, Jossey-Bass Educational Series, pp 358–388, 2005) outlining four main goals of teacher learning: a vision of practice, knowledge of students and content, dispositions for using this knowledge, and a repertoire of practices and tools. The pedagogical framework is based on the work of Grossman et al. (Teach Teach Theory Pract 15(2):273–289, 2009a; Teach Coll Record 111(9):2055–2100, 2009b) outlining three pedagogies of practice: representations, decompositions, and approximations of practice. We use the curricular framework to examine the opportunities for teacher learning that were afforded by these three different pedagogies of practice in a unit on leading classroom mathematics discussion in a secondary mathematics methods course. We use evidence from our analysis to show how the coordination of those pedagogies of practice is better than any one of them in addressing important goals for teacher learning about classroom discussions. 相似文献
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This study explored Canadian and American pre-service elementary teachers’ self-efficacy beliefs for literacy instruction, as well as the contextual factors (i.e., course and field experiences) that contribute to these self-efficacy beliefs. Survey data were collected over a two-year period at the beginning and end of a required elementary literacy methods course that assessed pre-service teachers’ self-efficacy for literacy instruction. A content analysis of the American and Canadian literacy methods course syllabi was also conducted. Paired t test results showed no significant difference in pre-service teachers’ literacy teaching self-efficacy scores from pre-test to post-test; however, there was a significant difference in the pre-service teachers’ literacy efficacy beliefs related to oral reading from the beginning to the end of the course. A weak negative correlation was found between the Canadian pre-service teachers’ total Teachers’ Sense of Efficacy for Literacy Instruction (TSELI; Tschannen-Moran & Hoy, 2011) scores and their teaching experience specific to literacy instruction, r = ? .1, p = .04. There was a positive correlation between Canadian pre-service teachers’ self-efficacy scores related to engagement and differentiated instruction and their volunteer and work experiences. A positive correlation existed between Canadian and American pre-service teachers’ self-efficacy for reading/writing connections and university coursework related to literacy instruction. Implications for literacy teacher educators and recommendations for literacy instruction are discussed. 相似文献
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Brooke Klingberg Natasha Schranz Lisa M. Barnett Verity Booth Katia Ferrar 《Journal of sports sciences》2019,37(4):378-386
Fundamental movement skill (FMS) assessment in preschools allows for early intervention; however it is unclear what assessments are feasible. The purpose of this review is to systematically review the feasibility of FMS assessments for pre-school aged children. The search was conducted across four databases, MEDLINE, Scopus, ERIC and SportsDiscus. Search terms included synonyms of “fundamental movement skills” and “pre-school children”. Inclusion criteria were: (i) FMS assessment; (ii) feasibility data; (iii) assessment of children aged three to six years; (iv) assessment of typically developing children; and (v) peer reviewed full text publications in English. Feasibility concepts (administration time, equipment, space, assessment type, item, training, qualification) were each coded as ‘poor = 1?, ‘average = 2? and ‘good = 3?; potential total of 21. A total of 330 full text articles were considered but a quarter (n = 86) were excluded due to no feasibility data. Sixty-five studies using 13 different FMS assessments were included. The Athletic Skills Track and DEMOST-PRE assessments were most feasible (18/21) and the Test of Gross Motor Development and Movement Assessment Battery for Children were common but among the least feasible (12–14/21). This review allows pre-school staff to choose a FMS assessment based on feasibility. Future studies need to present feasibility of assessments. 相似文献
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The purpose of this collective case study was to explore the resultant effects of vertical team teaching and collaborative inquiry on elementary (Grade 8) and secondary (Grade 9) educators' literacy instructional and assessment practices. Key elements of the program included collaborative inquiry and vertical team teaching. The findings of this case study provide professional learning suggestions for teachers, administrators, consultants, support staff, and district and state administrators that aim to improve future transition programs and literacy supports. 相似文献