Plastic pollution is found in marine and terrestrial ecosystems. Plastics can enter the food chain, accumulating in aquatic species’ organs or humans 1. People’s attitude towards nature represents the driving force behind the commitment to ecological behaviour 2. Therefore, it is necessary to raise environmental awareness at school. For this purpose, a study was carried out with 40 Spanish grade-8 (13-14 years) students from a high school in Malaga (Spain) belonging to two class groups. First, the students answered a survey on their knowledge of plastics. Secondly, a design and implementation of a teaching-learning sequence on critical thinking and plastics was carried out 3. The teaching-learning sequence consisted of murals and presentations on the types of plastics, an inquiry into different plastics 4, a role plays about the ban of single-use plastics, and an audio story. Finally, they did the same survey as post-test. Productions were categorised as adequate and inadequate responses. The behaviour of the two groups was similar as the Chi-square test showed no statistically significant differences between the two groups. However, McNemar’s test showed significant differences in some items, namely on microplastics, recycling and pollution, in all cases in favour of the post-test, indicating the effectiveness of the teaching-learning sequence.
López-Fernández et al. (Sat,) studied this question.