The period solidified the shift toward communicative competence as the primary objective of second language instruction, emphasizing authentic interaction, task-based learning, learner variability, and the integration of theory with classroom practice. It foregrounded input, negotiation of meaning, and social-cognitive processes as the engines of second-language development, guiding materials design and assessment toward real-world communication. Historical Significance: The approach reframed bilingual education by highlighting cross-language transfer and the educational development of bilingual children, clarifying distinctions between cognitive and academic language proficiency and everyday interpersonal skills, and establishing a foundation for later second-language acquisition research that centers learner-centered, usage-based pedagogy.