20s
background
caucasian
cell phone
chatting
chinese
classroom
college
concentrate
desk
dialling
education
female
holding
indoors
institute
institution
learn
learning
looking
looking away
male
man
mixedrace
mobile phone
paper
pen
pencil
scholar
sitting
smartphone
student
students
study
studying
table
talking
text message
text messaging
texting
typing
university
woman
young adult