Empty blackboard with chalk smudges and textured surface for education or presentation use.
Schlüsselwörter
blackboard,
chalk,
textured,
surface,
school,
education,
texture,
dirt,
classroom,
slate,
presentation,
writing,
smudge,
board,
marker,
study,
environment,
room,
element,
wall,
tool,
teaching,
blank,
item,
instruction,
erase,
cover,
lecture,
page,
visual,
background,
learning,
message,
dark,
stationery,
concept,
frame,
setup,
note,
signs,
cognition,
art
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