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Helen Ladd takes a comparative look at policies that the world's industrialized countries are using to assure a supply of high-quality teachers. Her survey puts U.S. educational policies and practices into international perspective. Ladd begins by examining teacher salaries-an obvious, but costly, policy tool. She finds, perhaps surprisingly, that students in countries with high teacher salarie...

Social learning network analysis has drawn attention for most researcher on e-learning research domain. This is due to the fact that it has the capability to identify the behavior of student during their social interaction inside e-learning. Normally, the social network analysis (SNA) is treating the students' interaction merely as node and edge with less meaning. This paper focuses on providin...

Our research concerns teaching assistant systems. It deals with the question of reuse and exploitation of learners profiles by the different actors of the learning situation; teacher, learner, families, institution or scientist. This paper first describes the difficulties linked to the reuse of heterogeneous existing learners profiles. Then, REPro, a learners profiles m...