I think this is what you might be looking for.
http://www.guitartricks.com/lesson.php?input=10072&s_id=249
After that you might want to look at this one for some more info on modes
http://www.guitartricks.com/lesson.php?input=7360&s_id=50
Exercises
After all that theory you could hit Doug Fearman's instructor's section where he posted a great number of tutorials, all with practical application of scales. Doug has one of the most extensive lick collections on the site.
You could also check out Dr. Simon's tutorial for some scales exercises
http://www.guitartricks.com/lesson.php?input=8093&s_id=69
Hope these will help you out find your answer