What boarding school?
pl.wikipedia.org/wiki/Internat
I don't know about Poland but in some countries like Ukraine, it is usually not a problem to find a place in a govt. internat, especially if a child itself want to live there. Majority of children usually don't want to, so only unliky live there. Those who have no close relatives to take them in. But if nice girl complains about such things and want to stay there, it is usually not a problem.