You catch glimpses of insight into the lives of your students, though they don't always tell you outright what's going on. I had my creative writing class come up with a list of 30 story ideas. Mixed among a cache of writing ideas that ranged from "My family" to "The summer playing softball" was something that made me stop and reevaluate one student.
There was no other explanation than that, and I wonder why she's lonely when it seems as though she's surrounded by friends and well liked by the teachers and staff. It bit to the core of something true though and I wonder when the next glimpse will come.