ask
blackboard
chalk
chalkboard
class
classroom
college
compass
drawing
education
engineering
equation
exam
explain
formula
girl
hand
handwriting
high school
holding
indoor
knowledge
learning
lecturer
lesson
math
mathematic
one
one person
pointing
professor
question
real people
research
ruler
school
science
standing
student
study
talking
task
teach
teacher
teaching
tutor
university
woman
writing
young adult
定額
A young Caucasian female math teacher stands at the blackboard and explains the solution of a mathematical problemの素材 [FY310192602788]
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