This article was amended on 8 September 2018.
An earlier version said the school was the Huntsville City School District.
This article is part of BBC Focus on education, a series about inequality in education.
You can follow the series here.
This article was amended on 8 September 2018.
An earlier version said the school was the Huntsville City School District.
This article is part of BBC Focus on education, a series about inequality in education.
You can follow the series here.