DOLIGHAN, Tim. Online by Choice: Design Options for Flexible K-12 Learning. (2023). Canadian Journal of Learning and Technology, [S. l.], v. 50, n. 2, p. 1–6, 2025. DOI: 10.21432/cjlt28630. Disponível em: https://cjlt.ca/index.php/cjlt/article/view/28630. Acesso em: 4 apr. 2026.