Best resource: clicker question collections (various sciences and math) database at PhysPort

This set of links to collections of questions for clickers or Peer Instruction is updated periodically, and is part of the excellent PhysPort resource (which is mainly for physics but in this and many other cases is valuable for all STEM disciplines). If you need more examples, they recommend you “can also find questions by googling ‘ConcepTest’, ‘concept test’, or ‘clicker question’.”