Aggression or Playing?

Who has told you to use these techniques?

Please don't try them.  They are not necessary and the risk for creating aggression in your dog is very high.

I stand by what I said before - her environment should be managed so she can't get on the couch in the first place.  Climbing up or jumping down from the couch puts unnecessary strain on her joints and I am sure you know the risk of hip dysplasia with this breed.  So she needs more supervision and confinement.  When she goes to get on the couch, try a low guttaral "ah-ah" and re-direct her to something else, something desirable you want her to do intead.  A sit or a down (if she knows these cues well) or a game or toy if she doesn't.  Then resolve to watch her more carefully next time!!

A note about growling: 
1.  Rotties are a vocal breed.  A grumble in itself is not necessarily a sign of aggression or dominance.
2.  Resource guarding has **** all to do with rank.  Once a dog has got something, a bone, a comfy spot on the couch..... it's his and he has every right to defend it, even from a "higher pack member". 
3.  Your approach to her may well be triggering the growling.  If she is not meant to be up there, it is natural for you to approach with your "scolding head" on, which could be simply causing a defensive reaction in her and again not related to dominance at all.  She is telling you "argh, you are scaring me and making me uncomfortable - please back off!"  If you do back off you reward her action and make her confident it will work again.  If you don't her response may escalate.  Both undesirable obviously - so as much as you want to let her know the couch is a no-go area, it is not worth risking conflict.
So: again, more management, more supervision, more confinement and if she does  get up there,don't put your scolding head on!  Call her, run out of the room excitedly, throw a toy for her, drop a treat on the floor, get on the floor and encourage her to come sit beside you.....  As she moves say "Off!"  and then make sure she is rewarded for complying.  There is more than one way to skin a cat, and there is more than one way to remove a rottie from the couch... and several that do not involve confrontation. 
Other things you can do: 
1. How comfy is her bed?  Make it more enticing, leave an old itemof your clothing with your scent on it.  If its a crate then shut her in there every time she is given bones or chews.  Praise her when she uses it!
2. Leave a booby trap on the couch to discourage her.  A large piece of card covered in foil may be quite effective, or a piece of card with tape wound round it sticky side out.  Another pieceof card to cover the sticky on one side so it can be left on the sofa and will leave an unpleasantly sticky (but totally harmless) surface for her paws when she tries to get up.
3.  A heavy throw to protect your sofa while she is so small and still learning about what she can and cannot do in your house.
 
ETA:  If you use "down" when you want her to get off something, what will you use to tell her to "lie down"?  Just a thought, so you don't confuse her.
 
What methods do they use at that class?  The fact that they won't take her till she is several months old is a red flag to me that they may not be a positive based class.  Also, the window for your puppy's socialisation starts to close around 14 weeks and a good class will recognise this and take puppies as early as possible to take advantage of that window.  I strongly advise you to look elsewhere.

My concern was just that the growling was turning into agression and we all love her and want to do what is best for her. I did a lot of research just did not know how to deal with the growling myself. I also have two toy poodles one that is 5 and the other which is 4. My male has always had issues with growling you never can touch him while he is sleeping or he will bite you.. He has been doing some growling at her but she just keeps trying to get him to play with her. She has really did a lot better today with all of this. She only growled one time and that was at my poodle. She had one pee accident in the house. I did cut down to a smaller crate due to the fact she was peeing in the bigger one. She has done very well and I have taken all of your advice and will be using it. she knows to sit now she is starting to lay down when told. I do use alot of treats.
The only reason she wants on the couch I believe is cause she wants the cat.
We tell her off and down to lie down.
 
I am not really sure about the class I am in Clearfield Pa and still looking for another class to get her into. I plan on showing her and I am taking her to a pet thing in Harrisburgh to get her out. My friend also breeds saint bernards and she will be around them also.

ORIGINAL: Rottie_lover6

Today she has done alot better with the growling issue. We have just been walking away from her when she does this.. As for the couch we tell her down and remove her. There is no puppy classes where I am located to put her in as of right not they want her to be atleast 4 to 5 months old and have her shots up to date.

Yup, a common mistake among trainers.  We allow pups 8 weeks old into class.  The premise being that more dogs die from behavioral issues (because they are given up, or they end up biting), than ever die from diseases.  Four to five months is too old to start training a Rottie.  And, frankly, if you haven't any experience in proper training, what made you choose this breed?  It isn't the breed you want to make mistakes with...
My advice would be to get a copy of Pat Miller's "The Power of Positive Dog Training" and read it cover to cover.  You will gain some insight. 
When you do finally get this dog to class, I hope it is with someone who is NOT your typical yank & crank trainer who is using choke chains, etc.  Rotts are smart dogs and fully capable of learning without force-based methods.  That does not mean that you should be permissive, just that you need to learn to demand respect in dog-friendly ways. 
Walking away when the dog growls just teaches her that she can get you to go away when she growls - again, not a lesson I would be teaching my dogs.  How do you expect her to understand that you want her off the couch if you just walk away?  The sequence is:
Guide the dog off the couch using the leash (she should be trailing the leash so you can guide her without grabbing her collar and risking being bitten, and so you can ignore any growling, but still request that she get off).
As you guide her off, say "off".
Once all four paws are on the floor, say "good off" and reward.

www.clickerlessons.com
www.clickertrainusa.com (free videos to watch)
www.clickersolutions.com

We tell her off and guide her off she does not completely get onto the couch as we don't let her get that far she tries to jump on it but at this point she is not tall enough.
 
I have always loved this breed and I did do alot of research before buying her. My pup was taken from her mom and placed in a horse barn from 4 weeks up until I got her. I know they are very smart dogs. She is improving as she only growled one time and it was not at us. I used to own Chow Chows for many years.