A task means any activity that learners engage in to further the process of learning a language.
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The ultimate goal of language teaching is to develop students’ linguistic competence, which includes both the knowledge about the language and the knowledge about how to use the language appropriately in communicative situations.
Communicative Language Teaching has replaced the previous approaches or methodologies.
According to cognitive theory, language is an intricate rule-based system and a large part of language acquisition is the learning of this system.
Interactional view considers that learners not only need to know the grammar and vocabulary of the language but also need to know the rules for using them in communicative context.