Purpose-Fundamentally, the success of schools depends on first-rate school leadership, on leaders reinforcing the teachers' willingness to adhere to the school's vision, creating a sense of purpose, binding them together and encouraging them to engage in continuous learning. Leadership, vision and organizational learning are considered to be the key to school improvement. However, systematic empirical evidence of a direct relationship between leadership, vision and organizational learning is limited. The present study aims to explore the influence of principals' leadership style on school organizational learning, using school vision as a mediator. Design/methodology/approach-The data were collected from 1,474 teachers at 104 elementary schools in northern Israel, and aggregated to the school level. Findings-Mediating regression analysis demonstrated that the school vision was a significant predictor of school organizational learning and functioned as a partial mediator only between principals' transformational leadership style and school organizational learning. Moreover, the principals' transformational leadership style predicted school organizational vision and school organizational learning processes. In other words, school vision, as shaped by the principal and the staff, is a powerful motivator of the process of organizational learning in school. Research implications/limitations-The research results have implications for the guidance of leadership practice, training, appraisal and professional development. Originality/value-The paper explores the centrality of school vision and its effects on the achievement of the school's aims by means of organizational learning processes.
A learning unit in earth science was taught to high school students, using a jigsaw-group mastery learning approach. The sample consisted of 73 students in the experimental group and 47 students who learned the topic in an individualized mastery learning approach. The study lasted 5 weeks. Pretests and posttests on academic achievement and affective outcomes were administered. Data were treated with an analysis of covariance. The results show that students of the experimental group achieved significantly higher on academic outcomes, both normative and objective scores. On the creative essay test, the differences in number of ideas and total essay score were not significant between the groups, although the mean scores for number of words were higher for the individualized mastery learning group. On the affective domain, jigsaw-group mastery learning students scored significantly higher on self-esteem, number of friends, and involvement in the classroom. No differences were found in cohesiveness, cooperation, competition, and attitudes toward the subject learned. The results are discussed through the evaluation and comparison of the two methods of instruction used in this study.
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