As early as the 1970s, the communicative language teaching (CLT) approach became popular among second language acquisition (SLA) researchers and second language teachers (Skehan, 2003). During the 1980s, "task" replaced the term "communicative activity" (Rubdy, 1998; Skehan, 2003) and in recent years, a number of researchers and teachers have called for a move towards task-based language
... [Show full abstract] instruction (e.g. Skehan, 1998; Bygate, Skehan & Swain, 2001; Ellis, 2003a). This literature review intends to examine the results of SLA research and pedagogies in task -based instruction in the last ten years or so and by so doing to provide language teachers with the knowledge of how to balance or improve language production through task design, task implementation and task sequence. It will also suggest the research implications for language teaching, learning and assessment.