1 in 60 children are diagnosed with autism spectrum disorder, and of those, 80% are also diagnosed with auditory processing disorder (APD), a condition where people have difficulty recognizing and interpreting sounds. Students with APD often become overstimulated by loud, sudden sounds (a fire alarm, for instance). In extreme cases, this overstimulation can trigger their 'fight or flight' response. They can become disruptive and even dangerous to themselves and to their classmates. Because of all these factors, students often need to be removed from traditional classrooms which can take away opportunities that are afforded to other students.