Now, I know exactly what they will do because it's plot-crucial. But as I write along, I realize that the first thing the heroine will do when another girl proposes discussing it is ask for examples.
You know, I didn't figure out what others did. Except in the generic sense of "some magical thing to contribute to the freedom, security and peace" of the place where they are attending school. I threw in "retrieve a useful magical object" and "devise a useful spell," but I think I will have to ponder it more.