The Honor Girl — Grace Livingston Hill

Pretty, young Elsie Hathaway was good at everything. She had received every honor imaginable in whatever she did. But on an errand to her father's home, Elsie suddenly realized that there was much more to accomplish in life. Her father had fallen on bad times, and her two brothers desperately needed her guidance. -- Could she meet the challenge of caring for her needy family? And would she ever be able to earn the respect of the doubting young man who kept watch over her?