Schools that experiment with bring-your-own-device policies have reduced their costs but must cope with a variety of student devices, some of which don't meet minimum standards for computer instruction.
And if a student misuses a device, it could be taken away from him or her, creating the exact opposite situation that benefits education. Naturally, the student who is prone to misuse a device is often a student who needs the device most. Textbooks don't generate such tricky issues.
Full story at The Journal.