This study presents the design and application of a didactic sequence aimed at enhancing high school students understanding of recyclable plastic polymers. The proposed teaching strategy incorporates cooperative learning activities to identify different types of plastics, particularly recyclable ones. The goal is to increase student's scientific knowledge, enabling them to make informed decisions to mitigate environmental pollution caused by plastic waste. The study also addresses the research question: How can I recycle plastic materials in my everyday life to avoid contributing to environmental pollution?