A growing number of s， teachers and city lawmakers aredemandingthat the New York City school system reverse its longtimeban onstudents＇ cell phones inside school buildings. Schoolofficials saythey＇re skeptical that they can count on students tokeep thephones off. They also say phone can be used for nefariouspurposes— cheating on tests， or taking inappropriate pictures inlockerrooms， for instance.
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