‘We’re keeping on top of the students’: making sense of test data with more informal data in a grade-level instructional team

Internationally, there has been a policy push for using student data for instruction. Yet, research has noted few examples of actually understanding how this data-use practice takes place. This study presents a case of an instructional data team making sense of student data. The study shares data to show how teachers’ process for using data to inform their instructional choices is an interpretive one. The study also highlights the fact that, to make sense of test data that are often incapable of capturing backstories of students’ work in school, teachers draw upon informal data that they glean from their observations of and interactions with students. The collective data in the heads of teachers emerge through data team discussions. We conclude with implications for policy, professional learning, and teacher development.     

Changes in body mass,stature and BMI in South African elite U18 Rugby players from different racial groups from 2002–2012

The purpose of this study was to determine whether there are differences between racial groups for body mass, stature and body mass index (BMI) in South African elite U18 rugby players and whether there were significant changes in these measurements between 2002 and 2012. Self-reported body mass and stature were obtained from U18 players (n = 4007) who attended the national tournament during this period. BMI was calculated for each player.White players were 9.8 kg heavier than black players, who were 2.3 kg heavier than coloured players (P < 0.0001). The body mass of all groups increased from 2002 to 2012 (P < 0.0001). White players were 7.0 cm taller than black players who were 0.5 cm taller than coloured players (P < 0.0001). Players’ stature measurements did not change significantly during the study period. The average BMI of white players was 0.9 kg·m^?2 greater than black players who were on average 0.7 kg·m^?2 greater than coloured players (P < 0.0001). The BMI of all groups changed similarly over the study period. The body mass, stature and BMI of elite under-18 rugby players in South Africa were significantly different between racial groups. This has implications for transforming the game to make it representative of the South African population.     

Automated LED tracking to measure instantaneous velocities in swimming

In this paper a video-based method to automatically track instantaneous velocities of a swimmer is presented. Single cameras were used to follow a marker (LED) attached to the body. The method is inspired by particle tracking techniques, traditionally used in the field of fluid dynamics, to measure local velocities of a fluid flow. During the validation experiment, a white LED was attached to the hip of a swimmer together with a speedometer. A swimmer performed four different stroke types. The velocity profiles using LED tracking were captured and showed less noise than the speedometer measurements. Only at times when the marker disappeared above the water surface due to body role in front crawl and backstroke swimming did the LED tracking fail to capture the athlete’s motion. The algorithm was tested in a 2D case with a single LED to illustrate the proof of principle, but should be suitable for implementation in a 3D analysis or multiple LED analysis.     

Want that is understood well before say that,think that,and false belief: a test of de Villiers's linguistic determinism on German-speaking children

Two experiments with 79 monolingual German speaking children between 2.5 and 4.5 years showed a consistent developmental gap between children's memory/inference of what someone wanted and what someone wrongly said or thought. For instance, when John is still playing and mother says, "John should be going to bed," more than 70% answered correctly that mother wanted John to go to bed. However, when mother said, "John is going to bed," about 70% answered wrongly that she thought/said that he was still playing. Correct answers emerged with the mastery of the false-belief task. In German, want sentences (about something to happen) obligatorily take the same grammatical that complement as say or think sentences. Therefore, the observed gap constrains de Villier's (1995) linguistic determinism, which claims that acquisition of the necessary grammatical structures for talking about the mind drives children's ability to think about the mind.     

关于中国古代体育起源的两个问题

1.对以民间传说与神话资料作为中国古代体育起源的依据提出了质疑,认为这种研究在把握资料上缺乏理性分析,这些资料只能作为传说来看待。2.对中国体育史学家提出的人类原始的体育活动方式可以追溯到5万年到10万年甚至50万年以前提出不同意见。认为岩画不能作为中国古代体育最早的考古学证据,考古学家几乎没有发现任何证据证明史前时代的中国有体育存在。3.甲骨文不能作为体育史学提供证据,它所提供的一些活动不具备竞技的特点,不能纳入体育或竞技格斗的范畴。从考古学的观点来看,真正的体育只能追溯到后周时代。     

Family-School Strategies for Responding to the Needs of Children Experiencing Chronic Stress

Children experience chronic stress in ways that can impair their brain functioning and overall development. This article articulates the unique needs of children experiencing chronic stress and discusses strategies that families and schools can use to support and strengthen children’s development across the social, emotional, and cognitive domains.