Excluded is a one-off drama showing as part of BBC Two's School Season.
It's set in the fictional The Lamont School, a struggling comprehensive in north London. Spanning the first few weeks of a new school year, the drama charts the intersecting stories of Amanda (Monica Dolan), an ambitious headmistress, Ian (Bryan Dick), an idealistic new maths teacher, and Mark, a troubled and disruptive pupil.
To find the young cast, the casting director Sarah Counsell eschewed theatre schools in favour of street casting and drama groups for kids who had themselves been excluded from school.
Directed by Misha Manson-Smith, the drama was filmed on location at The Grange School in Bristol for two weeks in the summer.
Excluded is on BBC Two at 9pm and BBC HD at 10.30pm on Tuesday, 21 September.