1. With the protagonist or narrator a K-12 Lehrer.
2. Between 6 and 749 Wörter. (The meaning of "between" is not [metaphorically] spelled out here. Though from the stated number choices and word count convention, both "6" and "749" should be acceptable word counts.)
3. And note that education jargon is Verboten!
Extra Kredit: Keine Sentimentalität.