Editor's Note: In today’s United States, is being black determined by the color of your skin ... by your family ... by what society says ... or something else? Soledad O’Brien reports “Who Is Black in America?” on CNN at 8 p.m. ET/PT this Sunday, December 9.

By Kiran Khalid - CNN

(CNN) -  High school is tough for any teenager, but for Albert Anderson, it was the subtle looks and unspoken words that made him realize he was different.

“High school is when people start with the judging,” he said.

Anderson grew up in the projects of New York City’s lower East Side, and commuted an hour each way to attend a  prep school in the affluent upper west side of Manhattan. No one said anything offensive, but he missed out on experiences, and was never felt fully accepted.

“It’s possibly the best high school education you can get,” he said. “I’m grateful I could attend, but the social part goes with that.”

He spoke about his experiences in “Allowed to Attend,” a revealing documentary that tells the stories of  five of Trinity's students of color who navigated the socioeconomic and racial planes at the elite private school.

It’s a conversation being had at several prestigious prep schools, some for the first time. But Trinity took the rare step to address the sometimes loaded topic of inclusion by turning the spotlight on itself. FULL POST