The teaching of traditional grammar in traditional ways is out of favor, and for very good reason. Still, in the coming decade, teachers of English will need to "know their grammar" and be able to explain it to a burgeoning number of English Language Learners (ELLs).
"The Importance of Grammar for English Learners and English Teachers in the Coming Decade,"
New Jersey English Journal: Vol. 9, Article 18.
Available at: https://digitalcommons.montclair.edu/nj-english-journal/vol9/iss1/18