Choral Responses. To increase student engagement and reinforce simple concepts, allow the children to respond all together. This works best for questions with one answer, and as a quick review of previously covered material.
Hand Raising for simple questions. When you have a yes or no question, ask students to raise up their hands if their answer is yes, and then ask raise your hand if your answer is no. Then finally, raise your hand if you don't have an answer. Quick assessment.
Cold Call. Keep a list of children’s names, on cards, or Popsicle sticks, and randomly pick children’s names using the Randimizer to answer. This helps to improve the pace of the lesson, and keeps children engaged since they don’t know when they will be called on. However, it should still be used sparingly since it still suffers from the problem of only one student at a time interacting with the question.
One more randomizer - for groups. To form groups out of two classes or more. It's only for forming two groups.
Hope this helps you in your teaching method.