Here is an article about a new open concept school that was constructed for DODEA students in Daegu:

Daegu Middle High School seniors Neena Ibit, Nurfatihah Melendez and Jonathan Wilson give a tour of their school at Camp Walker, South Korea, Friday, March 9, 2018.

Wander the halls of the new Daegu Middle High School and a you might feel like you’ve stepped into the future.

One of several “21st Century” schools that the Department of Defense Education Activity opened recently in Korea, Japan and Germany, the $20 million, 299-student facility is a far cry from most people’s childhood memories.

Its open-air studio classrooms are a contrast to the refurbished barracks where kids learned at Camp Walker before the school opened last fall. The school is so new that, on Friday, part of the cafeteria was cordoned off and filled with equipment waiting to be installed.

“This school is way, way bigger [than the old school],” said senior Nurfatihah Melendez, 17, during a tour that showed off spacious music halls, robotics laboratories and an impressive JROTC wing.  [Stars & Stripes]

You can read more at the link, but unsurprisingly the administrator have found out that the open classroom concept causes sound from other classes to going on to be a distraction and thus need to install walls.