A Practice Scaffolding Interactive Platform (PracSIP) is a social learning platformwhich supports students in collaborative project based learning by simulating a professionalpractice. A PracSIP puts the core tools of the simulated practice at the students' disposal, itorganizes collaboration, structures the students' activity, and interactively supports subjectlearning. A PracSIP facilitates students' development of complex competencies, and at thesame time it supports the students' development of skills defined in the curriculum. The paperintroduces the concept, presents the theoretical foundations, and gives an example of aPracSIP.