If they had cell phones in class, there is something wrong in the first place.
... Not any more, at least in most schools. Kids are encouraged to use their own technology. Paper text books are a thing of the past. Kids use school supplied as well as personal notebooks, laptops and cell phones to access information at school and at home All the textbooks are online. Instead of teachers writing on a chalkboard and kids taking notes they now use smart boards and the info is e-mailed to each student before changing to another screen. They then access the e-mails with their phones to study or do classwork and homework. In the rare cases where info is written on a whiteboard instead of copying it by hand the kids take a photo of the board before leaving class.