well, I used the frame that my husband made out of molding for my chalkboard.
For the board part, Calvin cut to size a piece of really thin particle board stuff...I'm not really sure what it is called, but you can get a big piece of it at Home Depot for $10. Then I primed and painted it and attached the board to the frame with a staple gun. As you can see from the smudges on the board, I have been using it. It's been great to jot down quick reminders and grocery items we need.