An opaque film covers classroom windows so that no one can look in from the outside. (k-12daily.org)
I remember the sunlight pouring through my floor - to - ceiling classroom windows. (attachmentparenting.org)
Natural light streams through the high windows along the hallways, while light «shelves» outside classroom windows bounce daylight into the room and shade the classroom from direct sun.The Daily Green did our homework for us by digging up more stats on the benefits of catching some rays, if you're still not convinced: (treehugger.com)