adult
attractive
beautiful
blackboard
caucasian
cheerful
child
class
classroom
education
elementary age
equation
girl
glasses
happy
indoor
kid
knowledge
lesson
math
preteen
pupil
school
schoolchild
schoolgirl
schoolkid
selective focus
signs
smile
smiling
study
symbols
teacher
together
togetherness
two people
woman
定額
Pupil writing on blackboard with chalk during math lessonの素材 [FY310120188835]
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