a piece of chalk
back
background
banner
billboard
black
blackboard
blank
board
border
chalk
chalk board
chalkboard
class
classroom
clean
dirty
drawing
education
empty
frame
grungy
illustration
isolated
learn
learning
lesson
menu
old
realistic
restaurant
retro
rub
school
shadow
slate pencil
smudge
surface
template
texture
wood
wooden
write