Computer practicals are an important part of many courses that are designed to teach the basics and details of computer-based methods. In the materials sciences, such methods play an in-creasingly important role. Typically, the practical courses require a physical presence in the PC pools, among other things because a large number of different programmes have to be installed and made available locally. In order to be able to use computer practicals fully and as far as possible independently of the students' circumstances in online teaching, a virtual PC pool based on virtual machines with web-based access was set up in the winter semester 2020/21. This virtual PC pool has been successfully used in various courses and can also be used in hybrid teaching formats in various disciplines.