Currently, the business market is characterized by globalization, strong competition, fast changes, increasing flow and obsolescence of information and demanding quality standards and productivity. To follow these transformations, the school also needs to evolve from the classical model to Collaborative Learning, in order to form individuals capable to communicating, working in group for the resolution of complex and interdisciplinary problems, coordinating the individual work and that of the group, and taking the best decisions. This research specifically investigates the collaborative evaluation in learning and working groups, and proposes IssueNet, a collaboration Framework for the management and collaborative evaluation of tasks. To validate the contributions brought about by the Framework, and to investigate what other influences it may have on learning or working groups, two case-studies using two distinct IssueNet instances have been carried through. After the analysis of the casestudies and of the based on the comments of the participants, we have concluded that the Framework satisfies our expectations by making it possible the collaborative evaluation in learning or working groups.