Costa, E.M. da 2025. The instrumental method in Vygotsky’s work: progress and challenges in investigating the child’s cultural development. Obutchénie. Revista de Didática e Psicologia Pedagógica. 9, Contínua (Aug. 2025), e2025–09. DOI:https://doi.org/10.14393/10.14393/OBv9.e2025-09.