"What if one day they say yes I can stay here but ask for my grades to see if I deserve it?" she said. "I have to do everything perfectly to have an opportunity."
The girl is currently enrolled at Oklahoma City Community College and receiving college credit. But she wants to go to the University of Oklahoma. It's been her dream since she was a child.
Without papers showing her legal immigration status, the freedom of being adult is eclipsed by the risks.
"I want to get a degree, get a job some place, get my papers and get my license. Now it doesn't mean anything if I'm 18. It only means I can get deported," she said. "When I graduate, I can't do anything."
"We've tried doing the right thing, and we don't get attention."
The family of another student at Brewster's school has been trying for lawful immigration status nearly all of their daughter's life. The wait for some types of visas is as long as 20 years, according to the U.S. State Department.
The parents of the bubbly 17-year-old came to the United States with visas and renewed them when they expired but didn't return to Mexico. They have an attorney and are working their way through the process. Because she's working toward legal residency, she is able to apply for some financial aid for college.
"We've tried doing the right thing, and we don't get attention," she said. "They don't care to hear our story; they just want to see the papers."
With a 3.9 grade-point average and a thirst for math and history, she's attractive to schools that are willing to work with her. Knowledge of history stings, knowing immigrants were once welcomed into the United States and only had to prove they were not sick to gain entrance.
"We took history classes about the way it was when people came through Ellis Island," she said. "A lot of people were just coming here to escape. Nothing has changed. Some people just want something better."
Like many students at Santa Fe South High School, her family is from Ciudad Juarez, the city in the Mexican state of Chihuahua where 6,500 people have been killed since 2008, according to local news reports.
"I want to be something bigger ..."
Athletics sometimes open doors for students who want to attend college but don't have legal immigration status, Brewster said.
Private schools might be able to find scholarship money for students who make the grade and excel in sports. That's what a 17-year-old cross country athlete at Santa Fe South High School was hoping. But a torn meniscus on her left knee could end those ambitions.
For this quiet, slender girl, it's something she's pondered before. The realization that being an undocumented immigrant limited her future hit her a year ago when she was a sophomore.
"I thought, 'Why even try anymore?'" she said. "Now, I figure I'll get educated here and go back to Mexico and work."
Begrudgingly, she thinks the only way forward is to return to the country her parents left to give her a better life.
"I want papers because I want to go to college," she said. "I want to be something bigger."
"I don't have status here — all I have is a student ID card."
The immigration debate is commonly about the number of Hispanics illegally entering the country from the southern border. But the son of an Oklahoma City business owner emigrated from South Asia, has lived in Oklahoma most of his life and is not a legal resident.
At some point, he knows his dream of higher education could end. He doesn't drive because he could be pulled over and deported.
"I don't have status here — all I have is a student ID card," he said.
The OU student wants to honor the sacrifice his parents made when they brought him here from South Asia as infant. His father was able to obtain a visa but could not get immigration papers for his son or wife.
The 19-year-old went to elementary school in Oklahoma City before going to an Edmond high school.
In eighth grade, he scored a 28 on his ACT. While in high school, he earned a 34, two points shy of a perfect score. He graduated early at the top of his class and corresponded with schools such as the Massachusetts Institute of Technology, Duke and Yale.
The results came back the same — without papers to prove he is a legal U.S. resident, he couldn't receive financial aid or scholarships. The price tag for the prestigious schools was too high.
His parents pay every dime of his education at OU.
"It's like you have these chains. When you get to college, you're supposed to be freed a little bit. It was the opposite for me," he said.
"Kids aren't their parents, and they shouldn't be pushed aside because of something their parents did. Mine just did what they had to do because they loved me enough to do it."Ongoing Coverage: Immigration