I am fascinated with chalk I found some free chalk brushes here http://colorburned.com/chalkboard-15-high-resolution-photoshop-brushes/

I also have some tutorial info from Adryane from her layout here https://ozone.oscraps.com/gallery/showphoto.php?photo=289617&title=annalift062813summers-past&cat=500

I am still playing with this, not sure it is quite there yet, but perhaps someone else would like to play

The chalkboard paper is from Studio 68 http://www.oscraps.com/shop/product.php?productid=31590&page=1

Chalked alpha also from Studio 68 http://www.oscraps.com/shop/product.php?productid=31591&page=1