CSCL scripts facilitate cooperative learning by constraining the activities of co-learners and thereby supporting coordination between distributed co-learners as well as guiding co-learners through the collaborative learning process. So far, such scripts have been encoded in CSCL environments and their tools. This made flexible adaptations of scripts an expensive task, which hinders experience-based improvements of CSCL scripts. In this chapter, we present a formal model of CSCL scripts and show how it can be used to help teachers and designers develop, adapt and experiment with CSCL scripts ...