african
american
asian
blackboard
board
book
boy
caucasian
chalk
chalkboard
cheerful
class
classroom
creativity
desk
diverse
education
explaining
formula
fruit
hand
idea
imagination
knowledge
learn
learning
lesson
lifestyle
math
positive
professor
reading
school
science
shape
solution
standing
strategy
student
study
studying
teacher
teaching
teenage
volunteer
volunteers
working
write
writing
定額
Skilled caucasian teacher looking at african girl writing answer on blackboard at elementary school. Professional student walking at in front of class to answer quiz in elementary classroom. Pedagogy.の素材 [FY310237633134]
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