Advantages
It gets straight to the point and can therefore be time-saving. Many rules can be more quickly explained than elicited, thereby allowing more time for practice and application.
It respects the intelligence and maturity of many students and acknowledges the role of cognitive processes in language acquisition
It confirms many students’ expectations about classroom learning, particularly for those with an analytical learning style.
It allows for teachers to deal with language points as they come up rather than having to anticipate them and prepare for them in advance.