> Personally, I feel the solution to insufficient teacher time is to use peer grading much more, and spot checks. Get kids to read and revise each other's works frequently, and teachers should aim to grade at least N papers per student where N is much less than the number of papers a student writes.

That's how it's done in creative writing courses. I've always found it infinitely more helpful than only having feedback from the instructor, even if the instructor's feedback was generally more helpful/useful than peer feedback.