Play with them in the second class, play games, get closer and make them like you.
Third, you should have your own dance or other outstanding points, show them and make them admire you, then of course you will be attractive to them and listen to you.
Fourth, dress beautifully, be gentle and lovely. Children generally like this type of teacher.
Five, in fact, four years old is the time to cultivate interest, not the time to make achievements. What you have to do now is to make them like it, and if you like it, you will naturally get results. More praise and more encouragement.