Old chemist teacher and two students in the classroom
Palabras clave
science,
scientist,
man,
student,
studying,
education,
scientific,
academic,
class,
classroom,
learning,
lesson,
school,
study,
university,
college,
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lecture,
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explaining,
discussing,
board,
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back,
to,
teaching,
woman,
tutoring,
classmate,
classmate,
secondary,
prof,
chemical,
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chemistry,
training,
green,
tutor,
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formula,
equation,
formula,
drawing,
chalk,
reading,
book,
textbook
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