Practicum experiences as sources of pre-service teachers’ self-efficacy

This study examines physical education pre-service teachers’ (PTs) self-efficacy and practicum experiences as self-efficacy sources through a mixed-method approach. For the quantitative phase, a self-efficacy questionnaire was applied to 141 PTs. Results showed a stronger self-efficacy in the relationship with students and discipline promotion. Lower self-efficacy was linked to instructional strategies. Concerning the qualitative phase, eight PTs were interviewed. PTs with higher self-efficacy reported professional experiences before practicum as mastery experiences. During the practicum they highlighted as mastery experiences: classes’ characteristics, planning and teaching practice; lesson observation as vicarious experiences; and post-lesson conversations as verbal persuasion. PTs with lower self-efficacy reported classes’ characteristics and teaching practice as failure experiences. Lesson observation was linked to negative vicarious experiences and post-lesson conversations were associated to negative emotions and the absence of verbal persuasion. This study’s results have implications inasmuch as they confirm the role of the practicum in teacher education programmes and the importance of training supervisors in the implementation and management of the training experience, thus contributing to PTs’ self-efficacy development.     

School innovation in district context: Comparing traditional public schools and charter schools

Market reforms in education are part of the educational policy landscape in many countries. Central to arguments for market reforms is the idea that competition and choice will spur changes in schools to be more innovative, which in turn will lead to better student outcomes. We define innovation in terms of a practice's relative prevalence in a local district context. A charter school is innovative in its use of a practice if the traditional public schools in its local school district are not using that practice. We explore factors based on arguments for charter schools that may affect a charter schools’ propensity toward innovation to explain variation in levels of innovation across charter schools. We find that, on the whole, charter schools do not fulfill their promise of innovation. Teacher tenure is the most notable exception. Parental involvement is the only characteristic of charter schools that significantly predicts variation in levels of organizational innovativeness.     

互补性与次协调性

玻尔互补性原理的准确意义已引起了许多争论。这里我们并不打算对玻尔的观点进行详细的评论,而是对在一种明确的意义上包含互补性被我们称之为C-理论的理论所能理解的东西作尽可能有道理的解释。那些理论的基本逻辑是一种通过对经典逻辑的演绎概念作恰当修改而得到的所谓＂次经典＂逻辑。粗略地说,C-理论是含有＂物理上＂不相容定理（尤其是矛盾定理）的非平庸理论。因此,其基本逻辑是一种次协调逻辑。本文被视为我们有关C-理论及其应用的一系列作品的第一篇。     

Analysis of the distances covered and technical actions performed by professional tennis players during official matches

The purpose of this study was to analyse the physical and technical performances of professional tennis players during official matches. The trajectories of eight players were obtained during matches, using an automatic tracking method. The distances covered and technical performances were analysed for the first and second sets. The athletes covered (mean ± standard deviation) a total of 1702.4 ± 448.2 m in the first set, 1457.6 ± 678.1 m in the second set and 3160.0 ± 880.1 in the entire match. No differences were found between the sets for the physical variables (lateral and forward displacements, distance covered per rally, per game and per set, and the percentage of time spent in each range of velocity). However, the distances covered by the athletes during the rallies in which they were serving (median = 5.2; interquartile range (IQR) = 6.7 m) were statistically smaller than when they were returning (median = 6.2; IQR = 7.7 m). Forehand ground stroke proficiency decreased from the first (mean ± standard deviation: 75.2 ± 4.11%) to the second set (mean ± standard deviation = 65.5 ± 14.3%). In conclusion, tennis players did not present reduced physical performance from the first to the second set.