LearningApps.org is a Web 2.0 application, to support learning and teaching processes with small interactive modules. Those modules can be used directly in learning materials, but also for self-studying. The aim is to collect reusable building blocks and make them available to everyone. Blocks (called Apps) include no specific framework or a specific learning scenario. The blocks are therefore not suitable as complete lessons or tasks. Instead, they must be embedded in an appropriate teaching scenario.