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291.
292.
The use of digital games as an instructional tool has garnered increasing attention in the education community. Empirical work supported by theory on the learning affordances of digital games allowed the game-based learning community to arrive at the consensus that digital games provide an excellent medium for the acquisition of skills and the exploration of concepts. The field, however, lacks research on how best to teach with games. For example, an unanswered question is whether gameplay should take place before instruction, after instruction, or integrated throughout in order to maximize the effectiveness of the game. To answer this question, a study was conducted with 103 middle school students who either played a digital game designed to teach algebraic concepts before receiving formal instruction, received formal instruction before playing the game, or received formal instruction intermittently during their gameplay session. The results indicate while on average all participants showed improvement in terms of learning, those who played the game before receiving instruction showed significant improvement. These results provide evidence supporting the theory that games are effective when used as an advanced organization tool. 相似文献
293.
The qualitative study reported on was, undertaken from a distributed leadership perspective, and was an attempt to provide understanding of how heads of department (HoDs) develop educators within the organisational context of different schools and subject departments. The findings are related to the current policy framework for professional development in South African schools. Two fee-paying and two non-fee-paying schools were selected and interviews were conducted with HoDs from single subject (unitary) and multi-subject (federal or confederate) departments in each school. The data was transcribed, coded, analysed and related to the research question. The findings confirmed that HoDs are a key link between principals and the educators in their classrooms. This supports the view that HoDs have formal responsibilities and accountabilities and they wield a horizontal and a vertical influence. Recommendations are made to improve professional development practice by HoDs in particular and in the education system in general. 相似文献
294.
Rodrigo Cappatode de Araújo André Luiz Torres Pirauá Ana Carolina Rodarti Pitangui 《Journal of sports sciences》2018,36(5):571-577
Scapular dyskinesis is the term used to describe changes in the positioning or movement of the scapula. Such dysfunction is associated with changes in the activation of the scapular muscles. However, the influence of the axial muscles on the scapular muscles activity of subjects with scapular dyskinesis is unknown. This study aimed to compare the electromyography (EMG) activity of periscapular muscles and its correlation with the external oblique muscle during the execution of push-up performed in different surfaces, in volunteers with and without scapular dyskinesis. Thirty-six men, divided in two groups (control and dyskinesis), performed push-up on stable and unstable surface. The EMG activity of serratus anterior (SA_5th and SA_7th fibers), upper (UT) and lower (LT) trapezius, external oblique (EO) was recorded during execution of each task condition. Statistical analyzes were performed using two way ANOVA repeated measures and Pearson correlation. It was observed effect of interaction between factors, being evidenced increased activity of UT, SA_7th and OE for the control group and decreased activity of SA_5th, SA_7th and EO for dyskinesis group during execution of push-up on unstable surface. In both groups positive correlations (r > 0.47) were observed between EMG activity of SA and EO. In the exercises tested, there seems to be an anatomical and functional relationship between the SA and EO muscles. The use of the unstable surface promotes increased neuromuscular demand, but the neuromuscular strategies appear to differ between groups. 相似文献