Framed within the theory and practice of social justice in English language teacher education (ELTE), the aim of this study was to foster pre-service teachers' awareness of social justice principles, issues and practices by taking part in a service learning experience during their higher education studies in a non-governmental organisation located on the outskirts of La Plata city in Argentina. In collaboration with their university tutors, three pre-service teachers taught workshops using intercultural literature in English during 2017-2018 for underserved children in the NGO. Data comprise four reflection logs written by each teacher candidate during 2017-2020, analysed using content analysis. Findings show the significance of providing an experientially grounded sense of social justice education. The study illustrates pre-service teachers' journeys toward social justice grounded in field work beyond the level of rhetoric. It also tests current perspectives on social justice in a South American setting, as work done on this basis has focused almost exclusively on Africa. Implications for ELTE and education in general are discussed.