Randomly selecting students can effectively enliven the classroom atmosphere, just like delivering packages when we were young, which makes everyone nervous and expecting. At the same time, because of its randomness, students who are usually afraid to raise their hands can naturally get the opportunity to answer questions, which can effectively avoid the psychological problems that some children may have because they are not selected or selected when answering some special questions, and also avoid the embarrassment that no one answers when answering questions.
You can't draw lots, but you can draw people. If it is a teacher's system, you can randomly select some people, then choose questions, and then let them answer this situation, because sometimes the random words given by the system are more accurate.