Diagrama V modificado como instrumento avaliativo da aprendizagem de alunos de um curso de licenciatura em química

Abstract

The evaluation is considered as a key part of any pedagogical device as they allow to recognize, in every moment, what are the difficulties that students encounter in their learning process and what the best strategies to overcome them. Based on these assumptions, this study aimed to propose the use of modified V diagram in a sequence, together with the concept maps as tools to assess the learning of research subjects about the content chemical bonds. Through such tools, we tried to follow the learning of students in those contents, by establishing relationships between the different content area of chemical science, worked out over the course of Inorganic Chemistry I. The study was conducted with students entering in the upper-Chemistry degree from the Federal University of Alfenas-MG and developed according to a methodology of qualitative research, whose goal is to investigate the meanings attributed by the people, events and objects studied. Data collection occurred from participant observation, open-type, and the observations were recorded in the results from the research in the field diary. Data were collected at two points, one in the discipline of general chemistry and other disciplines in Inorganic Chemistry I. In the first, we carried out a survey of students' conceptions about the subsumers, structure of matter and periodic properties, necessary to the understanding of the subject chemical bonds. This survey took place from evaluative questions proposed in evidence in this discipline. Subjects' responses to the research questions were analyzed according to the establishment of categories of analysis, through which it was identified that the majority of students did not have in their cognitive structures in a clear, distinct and stable scientific conceptions for referred subsumers. At first, too, were taught some lessons to introduce and instruct students in mapping conceptual and “Vê” modified. In the second phase, subjects were constructed by investigation, five and three diagrams modified V conceptual maps to assess understanding thereof on the content of chemical bonds. The analysis of these instruments are given based on analysis criteria proposed in the literature and the results indicated that, regardless of the objects and events studied, students always remitted to the same model, although the descriptions made reference to other models. For it is clear that the stability of the chemical bonds also explains the octet rule. Thus, it can be noted that the proposed instruments for the assessment of student learning, in this research, provided relevant data on student learning, referring to his advances and difficulties.