Development and Effectiveness Testing of a Scratch-Based Interactive E-Module Using the ADDIE Model on Whole Number Addition and Subtraction for Second Grade Elementary Students. Efektor, [S. l.], v. 13, n. 1, p. 1–16, 2026. DOI: 10.29407/e.v13i1.28237. Disponível em: https://ojs.unpkediri.ac.id/index.php/efektor-e/article/view/28237. Acesso em: 3 aug. 2026.