Bus award?

Leanna brought home a note yesterday saying she will be awarded the Bus Student of the month award at an assembly on Monday. It sounds pretty much the same as the Beary Best Bear Award-they get a small gift and have their picture taken. I called the school to make sure it wasn't a mistake, because we walk to school every day. But they said no, they give the award to the self transport students too. I wonder how they determine which non-bus students get the award then? It says the bus drivers choose the students to receive this award based on good behavior on the bus and following all bus rules.
Ah well, I'm proud of her, no matter how the award was chosen. A lot of kids walk or are driven by their parents, so it's still an honor.