Evidently, more-or-less constant internet use is part of a 21st-century education curriculum:

[Polk Schools Superintent Bill] Miller said if the system were to buy MacBook Airs, which cost around $1,000 a piece, for approximately 800 students, the system would be looking at a bill of almost $1 million. Purchasing Chromebooks on a ratio of one device per two students, at $400 per device, the system might spend $160,000 to $200,000.