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471.
The purpose of this study was to determine if the achievement on correlational thinking tasks could be enhanced by a set of structured training exercises. The exercises were based on Piaget's analysis of the development of correlative thinking in adolescents. The achievement of the ninth grade students was greater than the achievement of the fifth and seventh grade students. However, some of the ninth grade students exhibited difficulty with the equivalence and reciprocal exclusion operations that were necessary for the solution of the correlation tasks. The results of the study suggest that the ninth grade students may be in the transition zone for this particular operation.  相似文献   
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The purpose of this research was to design and test a model of classroom technology integration in the context of K-12 schools. The proposed multilevel path analysis model includes teacher, contextual, and school related variables on a teacher’s use of technology and confidence and comfort using technology as mediators of classroom technology integration. Data were collected from 1235 K-12 teachers, who were located in 336 schools in 41 districts across the state of Florida. The results suggest that a teacher’s experience with technology significantly influenced his or her classroom technology integration. Access to technology in classrooms and the availability of quality technology support were related to classroom technology integration. In addition, how frequently a teacher uses technology and his or her confidence and comfort using technology were mediators for classroom technology integration. These results provide preliminary evidence that the proposed model is both useful and relevant in explaining classroom technology integration in K-12 schools.  相似文献   
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Environmental consciousness-raising programs tend to emphasize the magnitude of imminent ecological disasters, if humans continue on their current trajectory. While these environmental literacy programs also call for action to avoid cataclysmic ecological changes, psychological research on “learned helplessness” suggests that information on the magnitude of ecological problems may actually present barriers to action, unless it is coupled with hope. We focus here primarily on Christian literature that finds hope for environmental action in the rhythms and beauty of Creation, in the biblical narratives of a people of hope, and in a faith community that worships and acts on behalf of the shalom of God on earth.  相似文献   
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