Situação-problema como estratégia didática para o ensino de propriedades coligativas

Abstract

This study investigated as the didactic strategy of problem situation resolution it can aid in the learning of the content of colligative properties in the high school, in fact in to 2nd series in the public school Almirante Soares Dutra located in Santo Amaro's Neighborhood in Recife-PE. For that, starting from the proposal orientations for Meirieu (1998), it was elaborated a problem situation about colligative effects of the solutions with addition of no-volatile substance. During the intervention, a text (produced in this work), experimental activities and commercial molecular models were used as didactic materials in order to the facilitate the students in the resolution of the problem situation. The obtaining of the data was accomplished starting from the instruments, questionnaire of previous conceptions (diagnostic evaluation), questions and discussions of the experimental activities (formative evaluation) and the answers found for problem situation (somative evaluation) recorded in audio. The obtained results showed that there was an evolution in the students' conceptions and that the experimental activities considering the cognitive level of the students aided in the development of the learning actions and mental operations of the students maintaining them motivated during the teaching and learning process. The resolution of the problem situation, by means of the conditions imposed the participant students of the research - suitable didactic material, work in group and interaction with the teacher-researcher, it contributed in a significant way to the understanding of the content of colligative properties of the solutions and some phenomenons of the students' day-to-day as show the data obtained after having analyzed appropriately.