Education is one of the most important pillars of society, and therefore, the charge of delivery is too. It is therefore very important to know the work of a teacher, what features must have, what activities should be done and how, what lies behind the fact stand in front of a group of students and teach a class. Knowing what makes a teacher, why and for what, is something that probably has not crossed his mind once, and if not, maybe is a good day to think about it. What is to be a teacher today? Generally, the teacher is seen as the person responsible for serving a group of students and provide the necessary lessons depending on the grade you are teaching, but this task is not as simple as it seems. For teaching, the teacher must have many key features for teaching, primarily language. Language is the instrument that is man to make known to others the way they interpret everything that is to around, and their ideas and opinions is the best means to convey the culture of peoples such as knowledge, values, customs, traditions, discoveries, developments, etc. The teacher should be able to teach much of the knowledge through the spoken language, creating a system of communication within the classroom which allows both the acquisition and analysis of knowledge. We must not forget that in a classroom, who would speak is the master hence the importance of his tone is appropriate and understandable to their students and the context in which he works.