Abstract:This essay presents a glimpse of the task-based language teaching mode (TBLT) as one of the most influential language teaching approaches in second language acquisition. After giving a clear definition of the approach, the essay explores the theoretical rationale for TBLT, first by introducing quite a few discoveries and hypothesis concerned to illustrate present understanding of the teaching methodology and then by comparing it with the traditional methods of language instruction based on presentation, practice and production (PPP). Then the essay analyses the factors that must be taken into account in designing efficient task-based lessons, factors such as the classification of tasks, thematic contents to be chosen, criteria for task difficulty, and effect depending on performance conditions. The essay also probes into some of the limitations and drawbacks of this approach. So the essay concludes by suggesting maintenance of a balanced application of integrative approaches so that TBLT can be complemented and enriched by other approaches.