Medienhaus/ ("Medienhaus slash") is an open-source learning and teaching environment developped, administered and bejeweled by growing community of UdK's students, teachers and IT-administrators. It aims to integrate, within a single hybrid package, open-source projects like Element (element.io) client / Matrix (matrix.org) protocol for purpose of asynchronous communication; BigBlueButton (bigbluebutton.org) for video conferencing and on-line learning; Kastalia Knowledge Managment System for construction of collaborative html5 presentations and Etherpad for collaborative writing. All UdK employees and students are cordially invited to log in into Medienhaus/ and join the community here.