The standard textbook approach has always reminded me of Johnny Cash’s song, One Piece at a Time, and gives similar results. The students, the few who persevere, have a lot of bits and pieces but they don’t necessarily fit together very well. https://www.youtube.com/watch?v=uErKI0zWgjg
We all know that magic tricks work because of the magician’s ability to focus our attention elsewhere. My students are focused on filling in the blanks, but actually my goal is to get them to listen to Comprehensible Input attentively and repeatedly.
“A century of research shows that traditional grammar lessons—those hours spent diagramming sentences and memorizing parts of speech—don’t help and may even hinder students’ efforts to become better writers. “