Click on the icon below this text and then on "Einschreiben" to go (anonymously) to our showroom. Here you will find examples of STACK tasks from various subjects by members of our STACK network. Important didactic principles are applied in the tasks, such as representational networking (just-in-time interweaving of the formal-symbolic with the descriptive world), adaptivity (individual task control), adaptive feedback and randomisation. The tasks are available as OER to all interested parties.