Watch Dropout Nation Preview on PBS. See more from FRONTLINE.

What does it take to save a student? Every year, hundreds of thousands of teenagers in the United States quit high school without diplomas – an epidemic so out of control that nobody knows the exact number. FRONTLINE spent a semester immersed in Sharpstown High to produce an unforgettable portrait of four students in crisis and the teachers, counselors, and principal waging a daily, personal struggle to get them to graduation. A troubling and inspiring journey through the maze of an inner city high school, Dropout Nation investigates the causes, challenges, and potential solutions of a national emergency. Droupout Nation airs at 9 pm September 25th