I have used in the classroom a concept of team quizzing. It is not always practical but for purposes of this training it is perfect. I printed out 4-5 sets of the letters A-D on different color papaer laminate and reuse. I give a set to each small group in the class and read out the quiz questions or have them on a powerpoint. In their group they come to the best answer, hold it up and then we compare why we got which answers and talk it through. It gives student confidence in themselves through a group process not just individually calling on one student at a time.