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For recently years the research of adaptation of computer education has been an important topic. Although Adaptive Educational Hypermedia Systems (AEHS) are different disciplines with IMS Learning Design (IMS LD), they have the same goal is to create the best possible environment for a learner to perform his/her learning activities in. How IMS LD addresses many requirements for computer based adaptation and personalized e-Learning is one of the main concerns for researcher in this field. | VNU Journal of Science Natural Sciences and Technology 25 2009 1-12 Developing adaptive hypermedia system based on learning design level B with rules for adaptive learning activities Nguyen Viet Anh Nguyen Viet Ha Ho Si Dam College of Technology Vietnam National University Hanoi 144 Xuan Thuy Hanoi Vietnam Received 25 August 2008 Abstract. For recently years the research of adaptation of computer education has been an important topic. Although Adaptive Educational Hypermedia Systems AEHS are different disciplines with IMS Learning Design IMS LD they have the same goal is to create the best possible environment for a learner to perform his her learning activities in. How IMS LD addresses many requirements for computer based adaptation and personalized e-Learning is one of the main concerns for researcher in this field. This paper represents an approach to learning design for adaptive learning system for adaptation of learning activities. Constructing set of rules for learning activities adaptation represented in first order logic and mapping them into IMS LD specification. In addition an adaptive course of computer science domain in online context is implemented using IMS LD design. Keywords Adaptive rules Adaptive Hypermedia. 1. Introduction In adaptive educational hypermedia there are a variety of research works about questions on how to adapt curricula and learning content to individuals and groups of learners has been done. There are methods and techniques has been promoted and implemented for adaptive hypermedia system 1 . In most adaptive educational hypermedia applications a learner model is the basis for the adaptation. This adaptation process based on each learner individually to his her knowledge needs preferences learning styles etc. conforming to Corresponding author. Tel. 84-4-37547463. E-mail vietanh@vnu.edu.vn learner-centered education 2 . Our researches 3-5 also had been developed adaptive educational hypermedia application that focused on generate