Puppy biting while walking

Question
Hi, we have a 5 month old mixed breed puppy.
She is a great puppy and has come a long
way in her behavior in the 2 months that we've
had her. Right now my only concern is that
while we're walking if she wants to greet
another dog or some people and we don't let
her, sometimes she will plop down on the floor
and start to chew on her leash. If we reach
down to lift her back up to keep walking  she
will start biting at my hands. We are holding on
to her because we know if we back off she'll
learn to bite at us when she wants us to leave
her alone. So we put her on her side until she
is calm.
We were in puppy classes and were taught to
turn her around and say "no bark" when she
barked at other dogs. She would do the same
thing then too. When we would reach for her
she would bite at our hands. She would know
we were coming too cause she would bark and
then turn around and be ready to bite us. So
my question is if holding her on her side until
she's calm is the right thing to do? I'm ready to
keep doing it as long as it is really going to be
what she needs. Is this part of her being a
puppy? Is there an age when this goes away?
I feel like she learned everything else so
quickly maybe I need to be more patient with
this behavior. Thank you!

Answer
If a dog stops walking, or starts to chew on their leash, the best thing to do is start walking, and at a brisk pace.  Don't lift her up, drag her if you have to but she has to follow you and start walking.  Biting the leash means the dog is trying to stop you from what you're doing, the leash is a control tool, think of it as disrespect, which is what biting your hands is, too.  She might be learning that biting at your hands is the way out of things, and to get her way.  I would recommend more training, formal obedience, with a good trainer.  I have never heard of turning a dog around to teach it not to bark.  Holding her down on the ground won't help with anything, it usually makes a dog more frustrated.  In formal obedience, she will learn "heel" and she cannot lunge or bark if she is heeling, and if she did, you can correct for it with the collar.