I really love chalkart. I don't know why, but I do. For my boutique a few weeks ago, I designed a chalkart piece to sell in the show and for me to decorate my house for the July 4th holiday.
I then submitted the file to Staples.com to be printed as a black and white 18" x 24" engineer print. It only cost about $2 to have it printed. Go HERE if you are interested in this service.
Just a hint, do not select the next day printing. It cost $5 and is not necessary. I have always submitted my prints the night before and they have always been ready for pickup by noon the next day.
As soon as you get the print back, trim the white margins off the print. I used my rotary mat and cutter to make sure I cut the sides nice and straight.
Next, cut a piece of 1/2" MDF to fit the size of your print.
If you want a make this project, you can purchase a digital copy of the Pledge of Allegiance Chalkart in my Etsy shop for $5.00!