Make sure she has plenty of acceptable chew toys around! Ice cubes are wonderful for teething dogs too. Depending on the breed of dog, chewing stages can last as long as a few short months to a few long years. Goldens for example like to agressively chew for about 2 years. They still chew after that but it slows down.

I have plenty of toys, Nylabones, kongs, and natural flavored knuckle bones. There is so much lying around that they never have a problem finding something to chew on that is acceptable.

When they do chew something unacceptable, give them a verbal correction and SHOW THEM what is acceptable.