1418
absorbed
activity
adolescents
african
apps
assistance
black
blackboard
boys
break
caucasian
class
classmates
college
desks
enjoying
european
females
friends
games
girls
group
help
indoors
information
interest
internet
lesson
males
multiethnic
obsessed
pastime
playing
pupils
recess
school
search
smartphones
students
surfing
teenagers
time
university
using
white
young
youth