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Description: The demonstration classes help the future teacher to experience how to function in their future work environment, in addition to providing a clear perception of what teaching implies. The purpose of it is that the knowledge of the subjects studied are applied in a class and analyze what should be improved, so that the teaching-learning process can be developed in a harmonious environment. The methodology implemented was Student centered/Constructivist approach, which is focused on the students and not only on the teacher. Because students are the only ones who remain actively interacting, in addition to suggesting possible topics to teach for better learning. In addition to the teacher must establish policies in order to maintain respect and order. It should be noted that the demonstration classes help determine if the teacher has the appropriate skills to be able to teach a class properly, since he/she will be the person responsible for transferring his/her knowledge to her students. As a result, the demonstration classes help the teachers to understand how it is their future work environment, improve in their lesson planning and application in the classroom, enhance the skills of the teachers when giving classes and not making the same mistakes.