https://www.nbcnews.com/nightly-news/video/california-high-school-bans-students-from-using-smartphone-66614341736
https://www.overyondr.com/howitworks
ref - https://news.slashdot.org/story/19/08/21/2226217/california-high-school-in-silicon-valley-is-locking-up-students-cellphones
https://www.overyondr.com/howitworks
ref - https://news.slashdot.org/story/19/08/21/2226217/california-high-school-in-silicon-valley-is-locking-up-students-cellphones