Vídeos de experimentos demonstrativo-investigativos: um estudo de signos produzidos por alunos de ensino médio sobre o tema combustão

Abstract

Based on the semiotic theory proposed by Charles Sanders Peirce (1839-1914) conducted a study that found the use of experimental videos demonstrative investigative contributed to the improvement of meanings, in the study of the subject combustion for high school students from a state school in the city of Campo Grande - MS. We described the stages of elaboration and filming of experiments demonstrative-investigative and subsequently their uses and evaluations in a didactic sequence. We apply a pilot study, a questionnaire prior and a principal study. Therefore, 59 students who attended the second and third years of high school participated in the research and have their speech transcribed and their writings analyzed. To measure the processes of signification and reframing of these students, we used semiotic classes that make possible the categorization of mastery of cognitive and scientific concepts manifest. The analysis of the arguments indicated that the didactic sequence may contribute to the teacher can get a sense of preconceptions (scientific concepts) and their cognitive capabilities (cognitive ability) that students have, as well, we got the confirmation that the material can promote the acquisition of signs by the students about the combustion topic. Among other conclusions, we believe that the didactic material matched our expectations and we indicated that as a didactic tool with great potential to further a research practice.