adolescence
academic
attentive
black
bonding
boy
casual clothing
caucasian
cellphone
cheerful
classmate
classroom
communication
confidence
connection
development
dialing
education
female
friendship
girl
happy
holding
interacting
knowledge
leisure
lifestyle
male
mixedrace
mobile phone
modern
phone
relaxation
relaxing
school
schoolboy
schoolgirl
secondary
showing
sitting
smartphone
smiling
staircase
student
talking
teenage
teenager
text message
text messaging
texting
together
typing
wireless technology
youth