Homeschooling,Virtual Learning,and the Eroding Public/Private Binary     

Aaron Saiger 《Journal of School Choice》2016,10(3):297-319

ABSTRACT

Regulators ubiquitously dichotomize schooling into two discrete sectors: public and private. Although homeschooling is regulated in some contexts as a third sector, the general approach is to treat it as a species of private education by subjecting it to public regulation while simultaneously denying it public funds. But the public/private binary is increasingly difficult to sustain as charter schools multiply and, especially, as virtual schooling increasingly penetrates primary and secondary education. Public school systems are deploying virtual education in ways that erode once impermeable walls between public and private. Many obstacles to homeschooling will fall with those walls—particularly obstacles related to government financing of homeschooling activities.  相似文献   

Do You See the Signs? Evaluating Language,Branding, and Design in a Library Signage Audit     

Amy F. Stempler  Mark Aaron Polger 《Public Services Quarterly》2013,9(2):121-135

Signage represents more than directions or policies; it is informational, promotional, and sets the tone of the environment. To be effective, signage must be consistent, concise, and free of jargon and punitive language. An efficient assessment of signage should include a complete inventory of existing signage, including an analysis of the types of signs, its location, language, and its design. This article outlines the steps involved in a comprehensive signage audit, which along with a literature review, provides the foundation for creating a signage policy, best practices guidelines, and a branding strategy for future signage.  相似文献   

CLASSROOM GROUPING AND INTEGRATION     

Aaron Upton 《Equity & Excellence in Education》2013,46(1):49-54

African American students and former students from a predominantly white institution (PWI) were interviewed to understand their perceptions regarding the impact of their families on their academic achievement and persistence. The characteristics of families that students perceived to support and hinder their academic success at college are described along with implications for improving African American college student retention theory and practice.  相似文献   

Comprehensive School Reform in Middle Schools: The Effects of Different Ways of Knowing on Student Achievement in a Large Urban District     

Marco A. Muñoz  Steven M. Ross  Aaron J. McDonald 《Journal of Education for Students Placed at Risk》2013,18(2):167-183

Comprehensive school reform (CSR), a federally funded program, is designed to raise student achievement via the implementation of whole school reforms. Unfortunately, although close to 400 CSR models have been adopted by schools nationally, there is relatively limited empirical evidence from rigorous research studies regarding the effectiveness of CSR in general or of specific models in particular. Of additional importance is the extent to which CSR models can demonstrate positive effects over time. The purpose of this study is to evaluate the effects on student achievement and attendance, in an urban school district in Kentucky, of the Year 3 implementation of the Different Ways of Knowing (DWoK) for the Middle Grades model. Results indicated that achievement results on both the Comprehensive Test of Basic Skills and Kentucky Core Content Test were significantly superior for the DWoK schools relative to matched control schools; no positive impacts on student attendance occurred for Year 3. The implications of the study lies in revealing that learner-centered CSR models that integrate the arts with the core curriculum can produce observable achievement gains in both normed- and criterion-referenced tests.  相似文献   

地沟油在日本     

Anonymous  Aaron  Grace 《高中生》2013,(13):38-39

2009年9月,日本东近江市面向乘坐本市公交快线的居民,开展了收集废弃食用油的活动。收集上来的食用油通过提炼,最终变成生物柴油,为运营在该市1 2条线路上的快速公交车提供燃料。由于发起"油菜花"环保项目,东近江市已受到日本全国的关注。该项目涉及一系列旨在为东近江市创建基于资源循环利用的基础设施的倡议,其中包含油菜的种植、菜子油的日常食用、废弃食用油的回收和提炼成燃  相似文献   

Hydration,sweat and thermoregulatory responses to professional football training in the heat     

Rob Duffield  Allan McCall  Aaron James Coutts 《Journal of sports sciences》2013,31(10):957-965

Abstract

This study examined the relationship between intensity of training and changes in hydration status, core temperature, sweat rate and composition and fluid balance in professional football players training in the heat. Thirteen professional football players completed three training sessions; “higher-intensity” (140 min; HI₁₄₀), “lower-intensity” (120 min; LI₁₂₀) and “game-simulation” (100 min; GS₁₀₀). Movement demands were measured by Global Positioning System, sweat rate and concentration were determined from dermal patches and body mass change. Despite similar environmental conditions (26.9 ± 0.1°C and 65.0 ± 7.0% relative humidity [Rh]), higher relative speeds (m · min^?1) and increased perceptions of effort and thermal strain were observed in HI₁₄₀ and GS₁₀₀ compared with LI₁₂₀ (P < 0.05). Significantly (P < 0.05) greater sweat rate (L · h^?1) and electrolyte losses (g) were observed in HI₁₄₀ and GS₁₀₀ compared with LI₁₂₀. Rate of rise in core temperature was correlated with mean speed (r = 0.85), session rating of perceived exertion (sRPE) (r = 0.61), loss of potassium (K⁺) (r = 0.51) sweat rate (r = 0.49), and total sweat loss (r = 0.53), with mean speed the strongest predictor. Sodium (Na⁺) (r = 0.39) and K⁺ (r = 0.50) losses were associated with total distance covered. In hot conditions, individualised rehydration practices should be adopted following football training to account for differences in sweat rate and electrolyte losses in response to intensity and overall activity within a session.  相似文献   

Activity profiles of the Australian female netball team players during international competition: Implications for training practice     

Aaron Fox  Michael Spittle  Leonie Otago  Natalie Saunders 《Journal of sports sciences》2013,31(14):1588-1595

Abstract

In elite sport, to remain competitive at the international level, it is critical to understand the game demands on players to ensure sport specific training programmes are designed for optimal athlete preparation and conditioning. In netball, recent research examining the activity patterns of players at the elite level is lacking, with only one study undertaken on this level of competition in the past 30 years. Therefore, the aim of this study was to provide coaches with up to date knowledge of player activity patterns as a basis for the design of optimal sport specific training programmes. The Australian female netball team were analysed using video footage of three international test matches. Player activity was categorised into five movement and eight game-based activities; and further classified as work or rest. Results suggest that differences in the current game exist when compared to the previous analysis. Positional differences were also found with regard to player activity confirming the need for an individualised component of training based on player position.  相似文献   

Relative age effects in Australian Football League National Draftees     

Aaron J. Coutts  Thomas Kempton  Roel Vaeyens 《Journal of sports sciences》2013,31(7):623-628

Abstract

This study examined the birth distribution for adolescent (i.e. <20 years) and mature age players (i.e. ≥20 years) selected in the Australian Football League (AFL) National Draft between 2001 and 2012. Birth-date information was accessed for all first time AFL national draftees and players were then classified as either adolescent (N = 736) or mature age (N = 70) draftees. Chi-squared analysis showed a clear bias in the birth distribution of adolescent draftees towards players born in the first part of the classification period for both quartile (P < 0.001) and half-year (P < 0.001) compared to the Australian national population. There was a reverse relative age effect (RAE) for mature age draftees, with a significant bias towards players born in the latter part of the selection period for both quartile (P = 0.047) and half-year (P = 0.028) compared to the Australian national population. The selection bias towards relatively older players in adolescent AFL draftees may be related to advanced physical and psychological maturity, and exposure to higher-level coaching compared to their younger counterparts. The reverse RAE in mature age draftees is a novel finding and supports the need for strategies to encourage continued participation pathways for talented Australian football players born later in the selection year.  相似文献   

The influence of 2 weeks of low-volume high-intensity interval training on health outcomes in adolescent boys     

Alan R. Barker  Josephine Day  Aaron Smith  Bert Bond  Craig A. Williams 《Journal of sports sciences》2013,31(8):757-765

Abstract

The present study aimed to establish whether 2 weeks of high-intensity interval training would have a beneficial effect on aerobic fitness, fat oxidation, blood pressure and body mass index (BMI) in healthy adolescent boys. Ten adolescent boys (15.1 ± 0.3 years, 1.3 ± 0.2 years post-estimated peak height velocity) completed six sessions of Wingate-style high-intensity interval training over a 2-week period. The first session consisted of four sprints with training progressed to seven sprints in the final session. High-intensity interval training had a beneficial effect on maximal O₂ uptake (mean change, ±90% confidence intervals: 0.19 L · min^?1, ±0.19, respectively), on the O₂ uptake at the gas exchange threshold (0.09 L · min^?1, ±0.13) and on the O₂ cost of sub-maximal exercise (–0.04 L · min^?1, ±0.04). A beneficial effect on the contribution of lipid (0.06 g · min^?1, ±0.06) and carbohydrate (–0.23 g · min^?1, ±0.14) oxidation was observed during sub-maximal exercise, but not for the maximal rate of fat oxidation (0.04 g · min^?1, ±0.08). Systolic blood pressure (1 mmHg, ±4) and BMI (0.1 kg · m², ±0.1) were not altered following training. These data demonstrate that meaningful changes in health outcomes are possible in healthy adolescent boys after just six sessions of high-intensity interval training over a 2-week period.  相似文献   

Time Needed to Change the Isometric Force Production of a Response     

Robert W. Christina  James H. Cauraugh  Aaron Shire 《Research quarterly for exercise and sport》2013,84(4):338-343

Abstract

This study investigated the time needed to change a motor program that specified the elbow flexor muscles to gradually increase the isometric force production from 15% to 75% of one's maximum voluntary contraction (MVC). A double-stimulation paradigm was used with the restriction that subjects (N = 12) be at 15% of their MVC before the presentation of the first stimulus. Subjects reacted to the first stimulus (randomly presented) by gradually increasing their isometric force from 15% to 75% of their MVC and then reacted to the second stimulus by altering the force production in one of four ways: (a) increasing the force to the 75% level rapidly instead of gradually, (b) discontinuing the increase and maintaining the level of force attained, (c) discontinuing all force production, or (d) reversing the direction of force so that it is produced by the elbow extensors. The data revealed that more time was needed to increase the force rapidly than to perform any of the other three conditions.  相似文献