Teacher at the blackboard
Palabras clave
blackboard,
university,
classroom,
physics,
success,
intelligence,
writing,
subject,
student,
lecture,
lesson,
back,
rear,
chalk,
teaching,
learning,
blackboard,
science,
write,
businessman,
formula,
study,
signs,
symbol,
male,
drawing,
solution,
school,
education,
college,
board,
teacher,
theory,
caucasian,
prof,
class,
adult,
studying,
wisdom,
seminar,
presentation,
people
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