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In this paper we introduce ARMOLEO, an ARchitecture for MObile LEarning Objects based on our concept of mobile learning objects. This architecture is aimed to allow learners to participate in individual or collaborative learning through simulated or real time authentic activities, supporting situated, personalized and collaborative learning.

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The chapter focuses on the modeling of software agents that present the performance and functionality needed for supporting collaborative learning, where collaboration is based on the social construction of knowledge, implementing the theory of knowledge creation by Nonaka and Takeuchi (1995). The chapter includes a discussion on the requirements for modeling software agents for learning environments, as well as the use of AI techniques for their implementation. The HCI issues of group configuration and awareness based on learner modeling in web-based environments are also discussed.