Larry Yudelson writes about a technology revolution taking place in New Jersey day schools thanks to a donation of about 500 iPads to three schools, equipping their entire sixth or ninth grades. Dan Fried, a local chemist, has jumpstarted technology in Bergen County classrooms by funding iPads for students in three Paramus yeshivot — elementary schools Yeshivat Noam and Yavneh Academy, and a high school, the Frisch School.