I am the parent of an elementary student and I can't see the evidence of a whole lot of grammar instruction from looking over my student's work, with the exception, perhaps, of learning the parts of speech. (Although, when I queried my child the other day, my child couldn't tell me what a preposition is.)
As I recall, the SAT has a fair number of grammatically related questions. How are kids preparing for SAT grammar in high school? Do PAUSD language arts and English classes prepare them well enough, or are high school parents having to play catch up with kids to get them ready for the SAT?