The Didactics of Informatics research group at the University of Paderborn is involved in efforts to design implement and evaluate a web-based learning laboratory for informatics (ILL). The ILL mainly serves the purpose of an open interactive learning environment for software engineering. The poster presentation shows the main components of an ILL and the types of media that are used. A didactical concept, learning strategies and the efforts to create self-organizing learning communities in the ILL are also topics of the poster. Finally, an evaluation concept will be presented including some basic results of empirical research which was done during a seminar held in the summer term 2003. Categories and Subject Descriptors: K.3.1 [Computer Uses in Education]: Collaborative learning, Computer-assisted instruction, Distance learning. General Terms: Human Factors, Measurement. Keywords Informatics Learning Lab, Learning Objects, Deconstruction of Software, Computer-based exploration envir...