Silva, M.M. da . 2021. Teachers who teach mathematics in initial training: the changes arising from the planning of a study task for the early years of elementary school. Obutchénie. Revista de Didática e Psicologia Pedagógica. 5, 2 (Jun. 2021), 430–457. DOI:https://doi.org/10.14393/OBv5n2.a2021-61409.