Blackboard chalkboard
Schlüsselwörter
blackboard,
board,
chalk,
blackboard,
black,
learn,
learning,
class,
room,
instructing,
tool,
show,
how,
algebra,
physics,
taught,
teaching,
grade,
grade,
obsolete,
smart,
erase,
eraser,
showing,
graphic,
white,
wood,
frame,
use,
letter,
number,
blank,
school,
education,
empty,
wooden,
old,
classroom,
vintage,
texture,
write,
slate,
message,
object
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