I used this graphic organizer for analyzing change in characters' relationships. I used this with a novel, but it can be used for short stories as well.
My students struggle with identifying where/when the relationship changed. I taught them to do the "beginning" block first, the "now" block second, then determine the change. Another way to incorporate student-to-student interaction is to have partner A complete the "beginning," partner B complete the "now," and together they complete the change.