[axus]

Google says enrollment was 78 students nine years ago, let's guess it's around 100 now; 25 kids per grade, managing those cell phones is a tractable problem compared to a school with 1000 kids.

[Podgajski]

And they cost $300 apiece! You have teachers buying just regular school supplies out of their own pocket in public schools.

[sixthDot]

Big public schools could use jammers, but afaik those equipements are not legal.