Rita Skeeter had the quick-quote quill, that seemingly
Could take dictation on its own
Even write on its own.
Why didn't schoolkids at Hogwarts use such quills in everyday study to:
Take notes in class
Help writing homework essays, at least the basic outlines.
One possible challenge may be that the quills might be expensive, but surely well-to-do kids like Harry or Draco (or those who absolutely value study like Hermione) would surely avail themselves of such.