FRANCO, D., & SANTO, E. (2016). THE CHALLENGE OF LEARNING IN THE DIGITAL AGE. AN ANALYSIS OF THE DER (School textbook, Portuguese Language, 12th year). TICs &Amp; EaD Em Foco, 2(2). Recuperado de https://xibo.uemanet.uema.br/index.php/ticseadfoco/article/view/108