In physical education, it is very important to communicate with your class. First of all, your students need to understand the activities they are about to perform. They also need to know different rules, safety precautions, and your expectations of them. It is important to make sure that you have your students' attention and to make sure that they also understand what they are doing. It would be a good idea to check for understanding from your students before, during, and after you perform an activity. Also, make sure when you are speaking to the class or student, make sure you have them gathered in such a way that they can see you (as well as you seeing them) and that they would be able to see any visual aids you may have. Be sure to speak loud enough so they can hear you as well. Remember, communication is key!