A recent study was conducted on screen time and grades of children ages 15 to 18. 65 % of students were categorized as excessive use (screen time was 5+ hours per day), 28% were considered moderate use (2 to 5 hours per day), and 7% are considered light use (less than 2 hours per day). Of the excessive users 15% had good grades (A/B average), while 47% of moderate users, and 83% of light users had good grades