Completo:

Experimentation in Chemistry teaching classes is occupying more and more an essential space in the process of teaching and learning. As a way to research this teaching methodology, this paper presents results of a survey conducted in conjunction with the execution of an experimental activity, developed with students of the 2nd year of high school at the State School of Elementary and High School ProfessorManoelMangueira Lima, located in the city of Cajazeiras-PB. Aiming to contextualize the study of the Law of Conservation of Mass, began the activities with enhanced theoretical knowledge by reading periodicals related to the subject. Then the students ministered practical classes using low-cost alternative materials focusing on the theme proposed in the study. Before and after the classes, applied with the students of that school A semi-structured interview for consideration and weighting of the students of knowledge. The survey results were presented through graphs. We can show through this work, that the alliance of lectures in context with practical classes only comes to contribute a significant learning by allowing the construction of knowledge. Thus, the use of experimentation in the classroom ends up taking the students to get involved in the construction of scientific knowledge, making them able to relate chemistry to everyday life, showing them that chemistry is present in the daily lives of each. And to be able to contextualize the Chemistry teaching, it is necessary to take into account prior knowledge of the students, so as to introduce the satisfaction of the scientific theoretical knowledge.