13
14
15
15 years old
boy
caucasian
cheerful
child
childhood
children
class
corridor
education
gadget
group
hallway
indoors
kid
kids
knowledge
male
people
person
phones
portrait
private school
pupil
relaxed
resting
school
schoolboy
schoolchildren
sitting
smiling
study
studying
table
teacher
teen
teenage
teenager
together
using
year
years
young