Modelling the long-run learning impact of the Covid-19 learning shock: Actions to (more than) mitigate loss

This paper uses a calibrated “pedagogical production function” model to estimate the potential long-term losses to children’s learning from the temporary shock of Covid-19 related school closures. It then models possible gains from two mitigation strategies. Without mitigation, children could lose more than a full year’s worth of learning from a three-month school closure because they will be behind the curriculum when they re-enter school and will fall further behind as time goes on. Remediation when children return to school reduces the long-term learning loss by half, but still leaves children more than half a year behind where they would have been with no shock. Remediation combined with long-term reorientation of curriculum to align with children’s learning levels fully mitigates the long-term learning loss due to the shock and surpasses the learning in the counterfactual of no shock by more than a full year’s worth of learning. Systems need to begin planning now for remediation programmes, and as they do so they should build programmes and train teachers in ways that can continue to produce benefits beyond the period immediately following reopening.     

中国女排接发球进攻质量与特点研究

对中国女排在1999年世纪杯和2000年奥运会与世界列强26局的比赛录像进行有关数据统计，从中比较与对手的差距，并将有关数据与相应的得分情况进行回分析，找出中国女排在比赛中连续失分的原因及规律，旨在揭示其在抓机遇发展自身特长上的不足，以供新组建的中国女排参考。     

新规则实施后中国女排与世界强队得失分之比较

以最新排球竞赛规则为依据，运用录像观察法，对’99世界杯女子排球赛中国女排与世界强队的攻防得失分情况进行了统计，比较分析了新规则实施后中国女排和世界强队的技战术表现特点，重点剖析了中国女排适应新规则过程中的滞后因素和环节，旨在为中国女排克服薄弱环节，提高训练针对性提供参考。     

当前女子平衡木发展趋势的研究

以37届世锦赛团体、全能和单项决赛运动员为对象,结合悉尼奥运会和2001年、2002年世锦赛等资料,从上法、木中和下法动作的发展,以及完成动作的质量等方面,对当代平衡木的发展趋势作了比较系统的分析研究,希望对我国平衡木的训练提供参考意见.     

Should Children Attend Their Parent's Funerals?

The paper discusses elements of the findings of 'Iceberg', a doctoral study at the University of York addressing many issues of child bereavement through a retrospective study of nearly one hundred individuals who had either experienced the death of a parent when they were at school, or were the surviving parent of such a child. The research revealed issues of lack of control and information for children after a parental death. Forty-seven per cent of those in the study attended the funeral of their parent. There was correlation between the age of children and attendance at the funeral. Of the fifty-three per cent of children not attending, twenty-four per cent of them were forbidden to attend, whilst eleven per cent of them were distracted from attending the funeral, such as being sent to school or a neighbours and being unaware that it was taking place. None of the children attending the funeral reported any negative experiences, and two thirds of them reported it as a positive or helpful event. In contrast, over three-quarters of those not attending later wished that they had. Over a third had feelings of regret, others feeling that they had been excluded from the family at the time of the death, and felt anger, hurt, and frustration. The conclusion was that the best strategy is to give children informed choice about whether or not to attend. If children do attend a negative outcome seems unlikely, but it would be prudent to prepare them as to what to expect at the ceremony.     

力量锻炼在控制体重中的作用机理初探

力量与力量耐力是健康体适能的重要组成成分。研究表明，力量锻炼在控制体重中的作用机理主要是通过以下两种途径实现的：一是增加安静时的能量代谢率；二是增加脂肪氧化。建议人们，要获得最佳健康并有效控制体重，应将有氧运动与力量锻炼相结合。     

关注教师的教育情感

作者对目前教师教育情感的失落作了简要描述,以期引起重视。     

对第28届奥运会中国女篮后卫队员得分能力的分析

中国女篮后卫队员个人进攻能力差是28届奥运会篮球比赛失利最致命的原因。在比赛中，我们看到中国女篮后卫队员总是躲着对方打球，主动寻找得分时机不够。场上表现为得分手段少，应变能力不强，投篮命中率低，投篮范围和方式变化不大，突破投篮给对方造成的威胁小，与国外后卫队员相比有较大的差距。     

运动减肥机制探析———酰化刺激蛋白的作用及其调节

酰化刺激蛋白是脂肪组织分泌的一种激素，在调节脂肪代谢和能量平衡方面发挥重要作用。它一方面能够提高脂肪细胞捕获脂肪酸和合成甘油三酯的能力；另一方面可以通过抑制激素敏感脂酶的活性来抑制甘油三酯的分解。C3（-/-）（ASP缺乏）鼠所表现出的肥胖抵抗特征对于防肥减肥而言具有诱人的前景。综述了ASP的来源、生物学作用以及缺乏后的生物学特征，并对其在运动减肥机制中可能发挥的作用进行探讨。     

赛前减体重对运动员运动能力的影响

赛前减体重能够对运动员的运动能力、身体机能和营养健康造成影响。笔者主要综述了国内外对减体重的研究资料,详细的对这一影响进行了概述,并认为在减体重时应用身体成分、蛋白质、无机盐和维生素代谢以及身体免疫能力等数个指标进行科学检测。