By the time each batch of bricks is labeled and “understood” by the class (as evidenced by the bogus test), as in the case of the relative pronouns brick which takes over a week or ten days to look at, and the students are vastly confused and bored because they still don’t see what the house looks like at all (they have no idea how the chapter fits into the book, how the brick fits into the chapter, how that pronoun family of bricks fits into the overall design of the house, how anything fits into anything), the house ends up looking nothing like a house. But that doesn’t stop the teachers. They just complain about having been sent the wrong kids that year.
The house the kids were looking to own one day has no form even after months and years of study. The kids are still looking at the bricks. They are made to stare at trees when they want to ascend into the air and see the beautiful forest. The result of grammar study is that the language house thus built has no shape or form, and, most egregiously, is not related to sound, which is what language is.