Go to PicMonkey.com, and select “edit photo” at the top of the page. Select the chalkboard jpg you saved from above, and it will open up on your screen. If you need to do any re-sizing, now is the time to do it, using the crop or resizing button you’ll see on the left.
Select the “T” icon on the left, and a whole list of fonts will be listed there. Some of my favorite fonts to use for chalkboard printable in Picasa are: Marcelle Script, Stroke Dimension, Sketch Block, Stampete, Base 05, Ostrich Sans Online, Jellyka Delicious Cake, Amatic Small Caps, Special Elite, Eraser Dust, Levitee.
Use the Text tool to select the white color (#ffffff), change the text size, and anything else you like!
Once you’re finished, SAVE YOUR WORK IMMEDIATELY. Once you close PicMonkey, it will be gone, and you would have to create it all over again. You can leave your browser open, and it will still be there, but I always save it before leaving, just in case.