Transcript for Hidden America: Diane Sawyer Revisits a School at Risk Called Strawberry Mansion High
officers on control. Next here tonight, proof that generosity can change lives. It's part of our hidden america series. Last may I reported on strawberry manks, a high school inside philadelphia. For five years considered one of the most dangerous schools in america. You met that night the valiant principle trying to save her students and her school. Tonight we just want you to know how you helped as hidden america returns to a school and their dreams. Reporter: The school we showed you last spring was a school on a harigger. The 49 serious incidents like the ones we filmed and often principle linda wayman caught in the middle. A fight the day I was there, a student came in to try to protect me. If nobody told you they loved you today, you remember I do. Reporter: A principle trying to give the children who wanted to learn enough safety to do so, like this quiet 9th grader who told me she was bullied every day. Because I'm little. And this student who tried to show up today even though it was cramped at home. What are your favorites subjects? Chemistry. I like the at onlies and periodic table. Reporter: We saw this student, christine holland who didn't have the fee. Then our report and your unbelievable response. Just when I really did think there was no hope in america, then you all aired the special. I never felt such joy in my life. When them phones started ringing, oh, my god, somebody -- somebody besides me actually do care. Reporter: Right away you, our viewers, moved in. That senior, christine holland who didn't have the fee for the college she loved, got a scholarship. So did 12 others heading off to college. And you helped make sure the school had a lot of basic necessities like books and calculators and notebooks. The students themselves requested school uniforms and in part because of money from you, our viewers, they got them. Tonight malaysia in the 10th grade is doing well. Razzaq has moved outside of philadelphia and is living with his father. There is still a reality at strawberry mansion. There are still sites like this one posted on youtube. And the girl being hit by the way, who luckily escaped injury, is the same young woman who stepped in when I was there to try to protect me. We don't want nobody to hit diane. Reporter: Over all the number of serious incidents at strawberry mansion has plummeted so much that for the first time in six years this school is no longer considered one of the most dangerous in the country. And if there is one thing that symbolizes what has happened at this school, it is this. For 62 years the school could only dream of its own football team. Tonight not only do they have one, meet the strawberry mansion knights who ended their very first season last month undefeated. Undefeated! First season ever. In this community, in this school, we get no victory. We don't win anything. I might not be able to get them into harvard but I can give them hope. Don't underestimate the power of hope because when children have hope, they can succeed. And we have more stories of the power of hope coming up tonight on "nightline." Be sure to watch, including the story of a music superstar who decided to give the students something big.
This transcript has been automatically generated and may not be 100% accurate.