ABDU, M.; HUSSAINI, M. K. .; ABDULLAHI, G. Group Investigation Strategy: A Social Model of Teaching English as A Second Language in Senior Secondary Schools. African Journal of Humanities and Contemporary Education Research , [S. l.], v. 6, n. 1, p. 61–68, 2022. Disponível em: https://publications.afropolitanjournals.com/index.php/ajhcer/article/view/249. Acesso em: 11 oct. 2025.