Chalkboard with math equations and diagrams in an empty classroom
Palabras clave
education,
blackboard,
classroom,
blackboard,
school,
chalk,
drawing,
board,
background,
cognition,
college,
concept,
class,
teacher,
study,
black,
student,
university,
science,
mathematic,
space,
white,
algebra,
mathematic,
design,
back,
empty,
desk,
formula,
equation,
copy,
instructing,
academic,
crayons,
physics,
table,
book,
text,
calculation,
number,
solution,
wooden,
geometry,
learn,
theory,
symbol,
rustic,
greeting,
merry
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