The education ministry's National Assessment of Academic Ability surveyed sixth-grade elementary school students and third-year junior high school students across the country. The survey found that 37.3% of sixth graders and 49.1% of ninth graders spent at least three hours each weekday using social media or watching videos. Students who spent more time on such activities tended to receive lower scores in each school subject. The proportion of students who studied for at least one hour on weekdays outside regular classes stood at 50.3% among sixth graders and 61.7% among ninth graders. Students who discussed their schoolwork with family members also tended to spend more time studying outside the classroom.