Tymber my 17wk pup

Question
my baby tymber is a 17 wk gsd and in very good health especially since i have been reading your answers here on line ty. i have had her in obedience training here and i quit because the trainer keeps us blocked off from the rest of the class because she says my dog is too hyper and just wont listen. so i have been working with her at home and she sits , stays (for a short time), lays down, looks me in the eye on command and holds my gaze. not only does she do the verbal commands but she also does them in sign language. she is extremely smart. my problem with her is that she is nippy and mouthy and i have tried doing the pinching the lip against her teeth like you say and she just barks and does it again. she also likes to jump up on everyone she sees and meets. she also gets mouthy with them. she is so hyper. she gets her play and her training time but nothing seems to work. she loves all people  and other dogs but no one will let her play with thier dogs anymore because of her hyperness. she is tireless until i put her to bed in her crate at night. then she sleeps all night. i cant leave her alone in the house cuz she gets into everything and counter surfs. she chases the cats. tears things up ect.....  now i only have the one obedience trainer in town here so im pretty sure i need some help.    what do you suggest?

Answer
Some dogs are just higher energy than others.  It is too bad the trainer didn't work with you on keeping her quiet instead of isolating you.  dogs can only learn to stay on task around other dogs around other dogs.  

Consistently is very important in correcting jumping and other problems. Quickly correcting him each and every time he jumps on somebody is very important. He must never get the affection he wants. A number of things have been used including some negative things inthe past.  As part of the the trend away from negative methods, just step backwards leaving his front feet to fall to the floor. After a few tries, the dog may just stand there looking confused.

I am not the one that suggested pinching her lip when she nips.  Such harsh methods usually don't work very well.  Nothing will stop it instantly.  Young Labs, which I know best, and other puppies tend to very bad about biting. You see a litter of them, and all the ones that are awake are biting another one or themselves. I am not even sure they realize that when they are alone, if they quit biting, they would quit being bitten. At 3 to 4 months they are getting their adult teeth, and it seems they spend every waking moment biting or chewing. One thing you can do at that stage is to knot and wet a piece of cloth. Then freeze it. The cooling will soothe the gums. Only let the puppy have it when you are there to watch it. I maintain a Lab's favorite chew toy is another Lab. Otherwise they settle for any person they can. They keep hoping to find one that won't yelp, jerk their hand away, and leave.

You just have to keep on correcting them, hundreds of times, not dozens. Provide sturdy, safe toys such as Kongs and Nylabones. Avoid things they can chew pieces off and choke on them. Keep them away from electrical cords. Crates are essential for most young Labs and other dogs.

You will also need to crate her when you go away in the day time.  I am a big believer in crates, but hate to see any dog left over 4-5 hours. If you can't make it back to give it a mid day break, see if a neighbor or professional dog walker can. Doggy day care is a great idea too.