Empty black chalkboard
Palabras clave
blackboard,
blackboard,
classroom,
background,
billboard,
black,
blank,
board,
class,
clean,
college,
communication,
education,
elementary,
empty,
erased,
high school,
info,
isolated,
layout,
learn,
learning,
lesson,
mathematic,
message,
notice,
notification,
organise,
path,
primary,
remember,
remind,
reminder,
school,
script,
studies,
instructing,
university
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