One of our best success has been just the "Chalk Hand Lettering Pack" fonts, both on our website and on MyFonts website too (featured also on their december 2012 Rising stars newsletter).

 

This pack include the normal and shaded version of the script font with something more, a complete set of elements to render your "blackboard layout" stand out!

 

Check the whole "Chalk Hand Lettering Pack" fonts!