Background noise- if there is background noise this would cause a barrier of communication, as the audience wont be able to concentrate, noises could come from outside from people doing PE which you can’t do anything about because it’s a lesson. There might be noises from another classroom or from the corridors. To over come this barrier you could either communicate one to one or move to another room were there is no background noise

Lack of concentration- audience just not paying any attention by playing on their phones or talking to each other, or if their heads on desks. The speaker will know they aren't listening to what they are talking about and explaining and they are doing something else or if they don’t bother to write down notes if they were asked to. They could over come this barrier by having nothing to distract them by having no phones out and people not talking

Distractions- when the audience is trying to listen but either other people are distracting them, specially in a school environment as other children in the class don’t want to listen and will start conversation to others or start playing with something that will them distracted others in a room. Younger children can easily get distracted so when talking a class of year 4 they could get distracted by the weather outside or people playing outside, other students standing at the door way. To over come this barrier maybe go into a room were other children will be passing all the time, by going to classroom were it isn't near the drama apartment and where children do PE 

Language differences- this would be a clear barrier as if someone speaks a different language to you, so they don’t fully understand what you are explaining. In school there will be children going to a English school from different parts of the world some might know a little bit of English this would cause them to be slower and will find the simple things harder to understand than others would. By having someone who can translate then language into their language

Religious &beliefs differences- some people have different beliefs as they have been bought up that way. For example for when teaching in science and they explain about how the world was made and talk about the big bang theory and they don’t believe that happened so they don’t want to be taught that and walk out of the classroom. To over come this barrier you and that person might want to come to an agreement and maybe come to some conclusion.