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This paper presents the architecture and functionality of an extended and more flexible version of the WebCollage tool. WebCollage was initially developed as a teacher-supportive web-based editor to facilitate the design of structured collaborative activities, following the tenets of scripting theory. However, earlier versions of WebCollage did not cater for design flexibility, as the collaborative activity could not be adapted during runtime and provide personalized support to students on an as-needed basis. In this work we explain how adaptation functionality is integrated in the WebCollage tool, based on our previously presented and elaborated theoretical framework of adaptation patterns. An "adaptation pattern" is defined as a higher level description of a corrective intervention that an experienced teacher would implement during a session of collaborative learning, in order to respond to identified learners' needs and …