Purchase a piece of medium density fiberboard. Opt for a thinner and smaller piece ideally, but the decision is a personal choice. The fiberboard is a pretreated piece of wood that is readily available at most home improvement stores.
Coat the front of the wood in Rust-Oleum chalkboard spray. Cover the entire side evenly.
Let the paint dry for an hour. Sand down the painted side with a light-grit sandpaper. This will force the paint deeper into the wood and reveal any imperfections.
Add a second coat of paint to the wood. Allow it to dry for three hours.
Apply a third coat and let the board dry once again for three hours. Use the board as you would a standard chalkboard.