This paper focuses on collaborative work on interactive tabletops. To optimize the travel time of team members (remote workplace, telecommuting, and so on), collaborative work is now often remotely done. This brings many user interfaces issues between distributed platforms of each member. In the domain of context-sensitive user interfaces, which aims at an adaptation to the users, the platforms and the environment, context models have been proposed in the literature. We propose, in this paper, a context model for distributed applications centered on collaboration and interactive tabletops. The proposed model is validated by a distributed application, which is developed on two interactive tabletops with tangible interaction; these tabletops are equipped with RFID technology. This application, which has educational purposes, highlights the collaborative aspect and exchanges between remote users. The paper ends with a conclusion and several perspectives