The teething period is hard for both pups and their owners. Whilst pups have to put up with the pain of teething, their owners put up with the cost of the things they chew when they shouldn't.
My best advice during this period is:
They will settle down their chewing for a month or two and at around the 8 - 10 month old stage, you may find them chewing again. This is because they're getting the very last of their back teeth and they are hurting. Just go back to basics at this point and it will pass fairly quickly.
Remember, if you keep on top of their chewing at an early age, they will grow out of it. If you do not keep on top of it, they will likely develop it as a taught behaviour and it becomes much harder to un-teach them as adults!