Eh... lunging can be part of ground work. *shrug* I just think it's a skill that is learned through the years, as in I think its one of those things where if you really don't have it down pat, it's easy to mess up.
I've never perfected a lunging program so I don't do it.
I've had very good luck just working on an 8' leadrope and doing lots of follow the leader type stuff. I'll stand at the horse's shoulder and take a purposeful step into their space (say to the right), the horse should then take a step to the right. I'll back up, the horse should back with me and stop when I do. I do more of a simon says type training
( Of course I use verbal cues while I'm doing all this. Right, Left, Back, Walk, Whoa.
I also think it's important to let horses figure out some stuff on their own. I would just hold off lunging until she understands commands better.
You by all means do what you feel is right for your horse and what type of disipline you are following. I'm just a happy hacker and horse lover, I don't compete and don't follow any "traditional" methods.
Good Luck and most of all HAVE FUN & BE SAFE!!!!
Be strong and courageous, and do the work. Don't be afraid or discouraged by the size of the task, for the Lord God, my God, is with you. He will not fail you or forsake you.
1 Chronicles 28:20