THE CHALLENGE OF LEARNING IN THE DIGITAL AGE. AN ANALYSIS OF THE DER (School textbook, Portuguese Language, 12th year). TICs & EaD [Internet]. 2016 Nov. 4 [cited 2025 Sep. 27];2(2). Available from: https://ticsead.uemanet.uema.br/index.php/ticseadfoco/article/view/108