I ordered this because I have a major problem in my classroom.  It seems that students would rather play with their phones than listen to me, their teacher.  Who would have thought such a travesty could occur?  In all seriousness I purchased this because the teacher next door to me had a similar one that she had her students put their phones in as they walked in the door.  She said it has been a real sanity-saver for her.  I have been at my wit's end lately with trying to teach lessons and keep an eye on students at the same time.