Abstract

The challenges in the present educational reform emphasize the professional character of the teacher in the planning of classes, execution of activities and evaluation of learning. A set of planned activities is not to a class of science as a pile of thrown bricks is to a house; this is, that if it is not counted on the knowledge of the preconceptions of the students, the daily realities that they face and of the expectations that these have at the time of participating in the science classes, cannot be obtained the proposed objectives. The well-known investigatory method applied to the education of sciences approaches the conceptual contents from practical activities of easy reproduction that are guided in effective form towards the topics to teach. Guides OPPS (Operation Primary Physics Science), of Louisiana University, are excellent examples of the application of this methodology, as much in the material that corresponds to the students as in the material for the guide of the learning activities (call Leader of the class). This international experience, within the framework used of the Plans and Programs of the Ministry of Education of Chile (MINEDUC), is the main axis of this work in which the accomplishment of guides with this methodology considers, approaching contained of a unit of the common plan of physics for third grade of high school.