Research
Below is a list of articles critical of the use of seclusion rooms:
http://thestir.cafemom.com/parenting_news/207177/iowa_school_seclusion_room_punishment
http://brighterschooling.com/solitary-confinement-used-public-schools/
http://www.kcrg.com/content/news/I9-Seclusion-rooms-no-set-standards-in-Iowa-Part-1--457811943.html
http://www.kcrg.com/content/news/I9-Seclusion-rooms-no-set-standards-in-Iowa-Part-2-458095413.html
http://daily-iowan.com/2017/12/06/smith-seclusion-rooms-modern-day-dunce-caps/
http://hppr.org/post/oklahoma-schools-continue-use-controversial-punishment-technique