Mediating effects of resistance training skill competency on health-related fitness and physical activity: the ATLAS cluster randomised controlled trial

The purpose of this study was to examine the mediating effect of resistance training skill competency on percentage of body fat, muscular fitness and physical activity among a sample of adolescent boys participating in a school-based obesity prevention intervention. Participants were 361 adolescent boys taking part in the Active Teen Leaders Avoiding Screen-time (ATLAS) cluster randomised controlled trial: a school-based program targeting the health behaviours of economically disadvantaged adolescent males considered “at-risk” of obesity. Body fat percentage (bioelectrical impedance), muscular fitness (hand grip dynamometry and push-ups), physical activity (accelerometry) and resistance training skill competency were assessed at baseline and post-intervention (i.e., 8 months). Three separate multi-level mediation models were analysed to investigate the potential mediating effects of resistance training skill competency on each of the study outcomes using a product-of-coefficients test. Analyses followed the intention-to-treat principle. The intervention had a significant impact on the resistance training skill competency of the boys, and improvements in skill competency significantly mediated the effect of the intervention on percentage of body fat and the combined muscular fitness score. No significant mediated effects were found for physical activity. Improving resistance training skill competency may be an effective strategy for achieving improvements in body composition and muscular fitness in adolescent boys.     

Classroom dialogue and science achievement

Conclusion This study indicates the responsibility that rests with the teacher in an activity-oriented classroom as far as providing the structural support necessary for effective learning (Note 4). The teacher is acting as a “surrogate textbook”. Using their own organization of knowledge-albiet wrong or incomplete-teachers provide the structure that is lacking. As the results indicate, some teachers can do this better than others. A challenge for teachers and teacher educators is to devise ways to improving the structure and sequencing of classroom dialogue. The TSA Technique could help here in two ways. It allows a sophisticated analysis of dialogue, indicating specific areas of weakness which could then be remedied by appropriate training. A similar approach has been used successfully with text material to rewrite and restructure deficient segments (Clarke; 1973). It could also be used to produce ideal “templates” of various models of teaching (e.g. Brady; 1985) for use as a guide for lesson planning.     

Exploring the relationship between early childhood and elementary grade-level overlap and early childhood teacher output

This study explores the relationship between grade-level overlap between elementary education (ELED) and early childhood education (ECED) licenses and ECED teacher output. Analysis of Title 2 data indicates that ECED/ELED overlap is extensive, as evidenced by the number of states with grade-level overlaps of 5 (n = 2), 4 (n = 24), 3 (n = 10), and 2 years (n = 7). In the 47 states with both types of credentials, ELED licensees may teach preschool in two states, kindergarten in 30, first grade in 41, second grade in 42, and third grade in 43. The percentage of ECED (relative to ELED) teacher licensure program completers is low in states where elementary licenses begin in preschool (5%), kindergarten (14%), and Grade 1 (23%), but higher in states where elementary licenses begin in Grades 2 (45%), 3 (44%), and 4 (70%).     

Problems Associated with Multi-Media Data Bases

Education is intimately associated with communication, and so may utilize any technology that is able to support a process that enables information to be transferred from one location to another. This paper describes the meaning of the term multi-media data base and presents a model of its potential role in aiding message creation for the purposes of communicating educational material using many parallel channels. Some of the problems associated with the implementation of such systems are outlined.     

学术殖民主义在行动:美国认证他国大学

美国认证是针对美国高等教育的现实而设计的，它反映了美国学术系统的历史、规范以及价值观。作为一个学术超级大国，美国有义务不在全球滥用其学术强势。不存在任何形式的世界认证警察。