PINGO stands for "Peer Instruction for very large groups" and is a web-based live feedback system for teaching to activate students, especially in large courses. Just as well-known quiz programs involve the viewers in the studio in the quiz via the audience joker, lecturers can use PINGO to get their students out of their traditionally passive role and actively participate in the lecture. They can answer questions asked by the lecturer during the lecture via their smartphones, tablets or laptops.