“…Besides answering a short conceptual question interspersed by the teacher, the students should discuss about the question to their colleagues (Fagen, Crouch and Mazur, 2002). The application of Peer Instruction is carried out using mobile devices, i.e., in the project Pingo (Reinhardt, Sievers, Magenheim, Kundisch, Herrmann, Beutner and Zoyke, 2012).…”