academic
advice
attention
bearded
beautiful
blank
busy
caucasian
chalk board
classroom
communication
concentration
education
engaged
ethnic
generation
group
happy
high
highschool
indoor
junior
knowledge
learning
lesson
library
male
man
mathematics
note
paperwork
people
portrait
prof
professor
school
schoolwork
sitting
smile
student
studygroup
studying
teacher
team
teenagers
teens
together
university
young
定額
Portrait of happy male professor during class with green chalk board on background. Teacher looks at students and explains topic of lesson in classroom. American high school, affordable education.の素材 [FY310195436561]
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