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Monitoring and analysis of activities of small groups of students-collocated or at a distance-engaged in synchronous collaborative problem solving activity is the subject of this paper. This is discussed in the frame of Synergo, a new synchronous collaboration support environment that monitors the activity and permits visualization of various quantitative parameters, like density of interaction, symmetry of partners’ activity, degree of collaboration etc, particularly useful for understanding the mechanics of collaboration. Synergo has been used for synchronous building of flow charts, concept maps, entity-relation diagrams and other semantic modeling activities by small groups of students and has been proposed as a testbed for micro-analysis of small scale interaction in order to gain an insight in collaborative learning.