ODEH, Salaheddin; QARAEEN, Omar. Designing Multimodal User-Interfaces for Effective E-Learning in the School Primary Stages Applied on Real Fractions. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 4, n. 2, p. pp. 39–47, 2009. DOI: 10.3991/ijet.v4i2.274. Disponível em: https://online-journals.org/index.php/i-jet/article/view/274. Acesso em: 27 apr. 2024.