This study analyzes the effects of education on the consumption habits of low-income adolescents, with qualitative research involving 16 students. We use sociointeractionist pedagogical theory, addressing concepts such as zone of proximal development, mediation, language, social and cultural context, and progressive development. We studied works by Paulo Freire, highlighting the relationship between oppressed and oppressor, dialogue, awareness and cultural contextualization. We investigated the connection between sociointeractionism and Paulo Freire s pedagogical theory, followed by reflections on consumption at the base of the pyramid, according to C.K. Prahalad s perspective. We focus on consumers in this layer and on economic development as a means of social transformation, exploring the role of consumer education and its application in formal education. Data analysis reveals challenges in evaluating teenage consumption and the impact of family influence, big brands and school on their habits. We correlate theories with data, offering a broad view of education, consumption and social development, concluding with considerations on student engagement, its consequences on the quality of education, school measures and the role of school in forming citizens aware of the oppressive relationship - oppressed and the impact of education for conscious consumption at the base of the pyramid.