The teacher at a given point of time has immediate control only over how he/she chooses to conduct the self and the class( which includes the ‘what’ and how’ of teaching/communicating). The behaviour of the audience, their reception, experience, feedback; or, the noise generated by them or other factors can be modulated/controlled only after its appearance. The technology, the communication channel, other communicators, and external factors are not under the teacher’s control.