Thank you everyone! Appreciate your understanding in how we've been feeling at puppy school! The one was an Aussie, so really had it out for her as far as biting her legs & tail (tail envy!

) & would be bad for grabbing her neck too! One extra play time, we did just drive away, when we saw he was there! But we couldn't escape him in pre-class play, until the last 2 weeks, he actually wanted nothing to do with her?! We were SO happy, but that lasted 30 seconds until bad dog #2 then completely took over bullying her.
Thru this 7 week course (was 8 weeks but 1st class was no pups), yes myself & hubby would pull Aussie or #2 (labradoodleish looking thing) off of her. Often my husband would pick Julip up to rescue her! (you know it was bad then! As he isn't as much of a "worry freak" as me) So for him to think it was a bad situation - it was bad!

The trainer was not very good, half the time he was on his phone/texting/ checking email? When play time was happening, so no he didn't see half the stuff!
I DID email him, my concerns about this Aussie being fixated on Julip & actually hurting her! It was after that email, in the next class that he did pull the Aussie off her the few times. But the NEXT class, he went back to his phone & not noticing anything Grrrrr.
NO, we will not be returning to that place for future training.
To answer some posts ...
I was (am) worried that it would make Julip reactive & mean! As after a couple classes, she would get "braver", & try to defend herself - she'd still be under the chair, but trying to bite back from there! I was pleased she started defending herself - BUT non of this seemed like the right way?
Luckily I don't see any permanent damage to her lovely personality. She is perfect with our cats & she plays wonderfully at the dog park (again, we ONLY go in the small dog side) - butt in the air, all bouncy pouncy puppy like, trying to get dogs to chase her. She actually loves to be chased, as SHE can set the running route, which always includes under anything she can fit, around every tree & thru everyone's legs! Of course the other dogs don't do the agility stuff she does, but they are running after her & she thinks that's perfect! (as unlike puppy school, they aren't catching & biting her!) She does chase other dogs too, usually its a couple of them all running crazy.
Someone suggested play dates at the breeders - they are over 2 hours away. She's had 2 play dates in our yard, a 1 yr. Shih Tzu that went wonderfully. And a Boxer that is 2 months older then her, but a great personality, a bit timid, so she wasn't playing rough. She was the 1st pup/dog Julip actually chased! So that did give Julip some confidence. The Boxer would then chase Julip, & then they'd switch. It was back & forth for the whole time, it was good for them both. I'm looking for more yard play dates!
Thank you for the fear imprint stages Tagg! Julip was 12 weeks at her 1st class. We thought starting her early was best for her socialization, but when we got there, the other pups were all more like 5-6 months! 2 great danes, labs, everything was huge!
Very much appreciate Toffee Mom's comment - "don't listen to advice about people telling you are over protective... at this point in your dog's life it's important she gets the best protection and learns she can trust you to manage the situation"
Thank you for that - its very helpful!