The Effect of Educational Units According to Karen’s Model on Learning the Serving Skill in Volleyball for Students. Damu Journal of Sport Sciences, [S. l.], v. 2, n. 5, p. 218–232, 2025. DOI: 10.64002/0tp73366. Disponível em: http://damujss.com/index.php/home/article/view/481.. Acesso em: 25 may. 2026.