how can i make a cheap blackboard?

i'm organising an event and need about 6 x A1 sized blackboards to sit outside 6 marquees listing the activities taking place in there throughout the day.

you can get blackboard paint in a spray can which gives you a smooth even finish!!!
cdubnbird8 years ago
at my Home Depot they sell paint that whatever you paint with it when it dries becomes blackboard material.
ANDY!8 years ago
Get some of the big sheets of paper from the dollar store and stick them on cardbord.
AndyGadget8 years ago
Cut up large cardboard boxes - The supermarkets usually have stacks lying around and you will be doing them a favour if you take them off their hands. Cut sheets of the required size and then give a couple of coats of blackboard paint. Once dry, duct-tape each board to two bamboo canes to stick in the ground. Job done!
(You'll have to buy some chalk too ;¬)