Here is the link to the tutorial that I used for my chalkboard. http://www.pepperdesignblog.com/2010/01/11/before-after-chalkboard-frame/.
I did things a little different because my budget for this was VERY SMALL! So instead of spending the $20 on the chalkboard paint that you paint on, I opted for the budget friendly chalkboard spray paint. I had to be really careful to make it even so no bubbles would show. And I did 3 coats just to be safe, but overall I don't think it made much of a difference.
One thing that you don't want to forget that this tutorial didn't include was that you will need to prep your chalkboard when you are done. Just take the side of your chalk and rub it all over the chalkboard until it's completely covered and wipe it off with a wet cloth. Do this at least 3 times. If you don't whatever you write on your board will permanently be there.
So this is a fun easy project! All you need is spray paint, chalk paint, and some chalk! I had a bunch of spray paint left over so I also updated an old frame we had to make something cute to put Brynlee's Birth Print in. I made this birth print forever ago, and almost 6 months later I am just now displaying it! Better late then never though.