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Certification tests for elementary teachers in Ontario were introduced in 1871 and in 2002. Although the provincial government’s stated goals for the testing programs were similar, the 2002 program was opposed by the initial teacher education programs and the teachers’ associations, but the 1871 program was not. The authors argue that much of this difference can be attributed to the relationship of the tests to other requirements for certification and the process for determining the content of the tests. 相似文献
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Abstract Measurements are presented of the speed at which six different rods could be swung by four male students. Three of the rods had the same mass but their swing-weight (i.e. moment of inertia) differed by large factors. The other three rods had the same swing-weight but different masses. Our primary objective was to quantify the effects of mass and swing-weight on swing speed. The result has a direct bearing on whether baseball, tennis, cricket and golf participants should choose a heavy or light implement to impart maximum speed to a ball. When swinging with maximum effort, swing speed (V) was found to decrease as swing-weight (I o) increased, according to the relation V?=?C/I o n , where C is a different constant for each participant and n?=?0.27 when I o >?0.03 kg?·?m2. Remarkably similar results were obtained previously with softball bats (where n?=?0.25) and golf clubs (where n?=?0.26). Swing speed remained approximately constant as swing mass increased (when keeping swing-weight fixed). The implications for racket power are discussed. 相似文献
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Nguyen Giang N. H. Bower Matt Stevenson Michael 《Education and Information Technologies》2022,27(6):8235-8264
Education and Information Technologies - Analysing pre-service teachers’ learning design conversations in relation to Technological Pedagogical and Content Knowledge (TPACK) framework to... 相似文献
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The primary aim of this study was to determine whether variations in rebound speed and accuracy of a tennis ball could be detected during game-simulated conditions when using three rackets strung with three string tensions. Tennis balls were projected from a ball machine towards participants who attempted to stroke the ball cross-court into the opposing singles court. The rebound speed of each impact was measured using a radar gun located behind the baseline of the court. An observer also recorded the number of balls landing in, long, wide and in the net. It was found that rebound speeds for males (110.1+/-10.2 km.h-1; mean+/-s) were slightly higher than those of females (103.6+/-8.6 km.h-1; P<0.05) and that low string tensions (180 N) produced greater rebound speeds (108.1+/-9.9 km.h-1) than high string tensions (280 N, 105.3+/-9.6 km.h-1; P<0.05). This finding is in line with laboratory results and theoretical predictions of other researchers. With respect to accuracy, the type of error made was significantly influenced by the string tension (P<0.05). This was particularly evident when considering whether the ball travelled long or landed in the net. High string tension was more likely to result in a net error, whereas low string tension was more likely to result in the ball travelling long. It was concluded that both gender and the string tension influence the speed and accuracy of the tennis ball. 相似文献
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Anna M. Bower Alan Hayes 《International Journal of Disability, Development & Education》1998,45(3):313-322
This paper describes some features of a study which compares and contrasts mothers’ perceptions of their family life in three different family environments, those without a child with disability and those families who live with a child with an intellectual or physical disability. All families have children in the middle childhood period allowing the mothers to reflect on earlier experiences and changes in their family life. Mothers’ psychological characteristics are explored in terms of the coping resources they utilise when meeting stressful life situations in their family and how their personal resilience and vulnerability is related to these individual coping resources. 相似文献
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