[Broken_Hippo]

I think the idea was to get the kids who probably had ADHD to lock in and do their work more

Wow that sounds terrible. My mother used to have me sit in silence at the dining room table to try to get me to do my homework. My god, so much noise. Libraries are similar. People adjusting on a chair, pages turning, pens dropping, car doors outside, eating.... There are just so many freaking little noises. I'd rather have a wall of noise so I can't pick out the distractions and work on whatever I was working on. (Not that it always worked, but I had a chance).