penelope wrote:Yes of course grammar is a short cut, but only for people for whom accuracy is a priority over fluency. I think learning the rules can actually slow down progress (students hesitate trying to think up the rule, try to construct grammatically accurate sentences before attempting to produce them). Students who "discover" the rules for themselves by actually producing language in the context of their daily routines are the ones who seem to make the fastest progress. With a lexical approach the student is learning vocabulary with the grammar intrinsically woven in, so it becomes effortless. And easier to accomplish independently and outside the classroom.
First, penelope, I have enjoyed reading your response to my post, thank you, and let me admit that I have had to think carefully before responding, for a number of reasons. However, to suggest that accuracy could be a priority over fluency contradicts my own experience, and let me explain. For instance, many years ago I was a student of mechanical engineering, and for the first couple of years I figuratively pounded my head against a wall, while being saturated with all but endless theories, of mathematics, physics, engineering, etc. Yet, there eventually came a point where a virtual ocean of theories somehow melded into place in my brain, and my grades as a student then went from good to nearly perfect. Now, I am not trained in language grammar and I recognize that grammar indeed can go to levels far beyond my comprehension, and yet I can apply the same lessons that I learned as an engineering student, in that even basic grammar can help to radically organize a language, especially a grammar dependent language such as Finnish. True, as a student I was "dedicated" to the study of engineering, 24/7, and so I can understand that grammar rules might only be useful to a language student who could similarly be dedicated.
penelope wrote: 
Not sure I know what you mean by "a substantial percentage of all the words in a dictionary could be dealth with handily". As both a teacher and a learner of foreign languages, I have never thought of language acquisition as a process of "dealing with words in a dictionary".
Well, most languages are made up of words, but not an infinite number of words, and apparently most of the words of any given language could be labeled with a grammatical title, and perhaps more than one, for instance, perhaps some words could have more than one grammatical classification. Then, it is a matter of learning all of the grammatical rules which could apply to any word classification, for any particular language, but once that is done then all of the words in a dictionary of that language could be managed by the grammatical rules.
My approach to language acquisition might not be universally appreciated, but it works for me.
