In educational environments, it is desirable to support the mechanism by which people can participate in interesting communities without any trouble and also to promote successful learning activities. Now that Web-based environments have been successively organized under a virtualized communication network or a logical interaction space, the architectural framework must be investigated. This paper addresses an architectural framework for handling knowledge in education from a viewpoint of personal activity. The objective is to design the support environment for personal activity in education, based on the seamless transition mechanism among individual educational environments. A three-layers model is introduced for educational support architecture. The three layers are educational environment, support system, and person role, from top to bottom. The lower layer is organized so as to contain the functional features in the upper layer, as basic and composite facilities for the construction. (Author)