||The development model of computer-assisted learning systems has been changed by the WWW (World Wide Web). EduCities, a platform of learning technology, consists of many learning systems and attract many users. Citizens (users) in this cyber city can be teachers, students, parents, and researchers. However, if those systems on this platform work alone, it will be lack of integration among them. It will increase the difficulties of using theses systems and make the development costs higher. These will also have problems as well as having users’ information scattering around. To solve these problems, we have designed and implemented a ”gluing mechanism” including a single sign-on (SSO) mechanism and a method of information sharing. It allows users authenticate themselves once and access different learning systems without re-authentication and makes learning systems share users’ learning information with each other.|
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