This research is aimed at contributing the development of fifth grade-high school student´s critical thinking. It is requested by the Ministry of Education in order to carry out teaching proposals to contribute to the teacher´s practice in the Master Program imparted at the Universidad San Ignacio de Loyola-2015. In terms of methodology, it is an education research that from a dialectic perspective, it integrates quantitative and qualitative methods for the study of the education phenomenon. As part of the field diagnosis, different methods, techniques and instruments that allowed verifying the objectivity of the scientific issue were applied. Applying theoretical and practical methods allowed triangulating the information, identifying the causes, consequences and designing a teaching strategy based on scientific references of critical thinking, and the developing learning and developing teaching that due to their nature strengthen motivation, collaboration, self-regulation and reflection in the teaching-learning process when changing the ways of thinking, feeling and doing of students.