backpack

boy

break

briefcase

caucasian

cheerful

child

childhood

class

classmates

corridor

cultural

cute

day

development

education

female

friend

friends

friendship

girl

girlfriends

girls

group

hall

hallway

happy

indoor

indoors

knapsacks

knowledge

lesson

people

person

portrait

pupil

school

schoolchild

schoolchildren

smiling

stairs

teenager

together

uniform

vacation

walking