That sounds like a wonderful class! Just having 5 dogs is wonderful!
Have you worked on the "watch me" command? It is a way of getting your dogs attention when she gets distracted.
Hold a treat up to your nose, say "watch me" or "look" or whatever, and when the dog gives you eye contact, immediately give the treat. Work on this and eventually the dog will hold your eyes for longer and longer between the treat. Eventually, just saying "watch me" will get the dog focused on you!
Cedar (tri), Willow (blen), Holly (ruby), & Bella (blen)