O Ensino de Dispersões Químicas na EJA a partir do Tema Gerador Alimentos: Uma Proposta Experimental

Resumo

Youth and Adult Education (EJA) is characterized by students with interrupted schooling trajectories and diverse life experiences, which requires teaching strategies that consider their realities and prior knowledge. In this context, this study analyzes the contributions of a teaching proposal based on a generative theme connected to students’ daily lives for learning chemical concepts. The activity was structured around the theme “Food” and addressed topics related to the classification of material systems and chemical dispersions, with emphasis on the distinction between true solutions and colloids. The proposal was implemented in a high school class of the Youth and Adult Education modality at a private school in Rio de Janeiro, Brazil. The teaching sequence included an expository–dialogic lesson followed by an experimental activity based on the observation of the Tyndall effect. Initially, students classified different food mixtures according to their prior knowledge and later reviewed their classifications after performing the experiment. The results indicate advances in students’ understanding, particularly in relating macroscopic and microscopic characteristics of material systems. The study highlights the potential of combining generative themes with experimental activities to promote meaningful and contextualized learning in Chemistry teaching within Youth and Adult Education.