[Graphic News] Half of upper elementary students use smart devices for over 2 hours
Nearly one in two upper-grade elementary school students use smart devices, such as smartphones and tablets, for more than two hours a day after school, a survey showed. The Korean Teachers and Education Workersโ Union surveyed 2,804 elementary school students in grades 4 through 6 from April 9-22. Nearly half of them, or 49.2 percent, said they use smart devices for more than two hours after school. Specifically, 21.1 percent reported using smart devices for two to three hours, followed by 15.9