Question: what are the merits and demerits of using literature in elt classroom?
Answer: Advantage: Authenticity. Proponents of literature-based instruction usually focus on the importance of using authentic literature, rather than the "canned" variety found in basal textbooks and other programs. ... 
Advantage: Higher Level Thinking Skills. ... 
Disadvantage: Teacher's Perspective. ... 
Disadvantage: Scope and Sequence.