Exchange is a collaborative learning application, originally developed for wirelessly interconnected Pocket PCs, that provides support for students and a teacher performing a face-to-face computer supported collaborative learning (CSCL) activity in a Single Input/Single Display (SISD) mode. We extend the application to support a single display groupware (SDG) mode. In this new version, named Exchange-MM, three users each with their own mouse (Multiple Mice) interact on a single display with mediation by a technological network. The original collaborative interaction is maintained. We describe a collaborative learning activity and the software architecture that supports both interaction modes, and also present a usability analysis of the activity conducted with second-grade schoolchildren. The results show that as in SISD mode, in SDG with Multiple Mice (MM) the technological network improves communication, negotiation, interactivity, coordination and appropriability between members of collaborative learning groups. (Contains 1 table and 8 figures.)