The Skills involved in Writing
Nowadays, there is very little need for long, formal written work in the TEFL classroom.
With the advent of email and word processors with spell checkers, most people do very little written word except for short notes to friends and colleagues.
Students may however have very specific needs such as those preparing for examinations where written work is still of great importance.
Writing allows students sufficient time to process information whereas speaking doesn’t.
Writing is also an avenue for those students who have limited confidence speaking in front of the TEFL class.
Writing allows for the practice of grammar rules and examination techniques.
In order to convey a similar amount of information, a written text is shorter than speaking because the student has time to be more specific.
https://www.itefli.com/teflblog/approaches-towriting-in-tefl/