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 Videos in Mathematics Teacher Training: Linear Systems and Perspectives for Pandemic Times. In <em>Proceedings of the 5th Congress on Technologies in Education</em>, July 31, 2020, Evento Online, Brasil. SBC, Porto Alegre, Brasil, 118-127. DOI: <a href="https://doi.org/10.5753/ctrle.2020.11389">https://doi.org/10.5753/ctrle.2020.11389</a>.