puppy bite training

First off, do not allow biting during play. When you're playing with them, if they bite, immediatley stop playing, say "no bite" firmly, then cut off all attention for a couple of minutes, this means no talking to them, touching them, and cut off eye contact. Eventually, with this method, they will learn that biting is not acceptable. Some people would recommend redirection (replacing your hand, etc... with a toy or something they are allowed to chew on, and praising them when they chew on it), but I have personally found that this method takes more time. Find a method that works for you, and stick with it.

As for them biting and jumping at you when you come in the door. Walk into the house calmly, giving them no attention until they are calm and quite. If they bite at you, firmly tell them "no bite" and ignore them until they calm down. If need be, push them away with your foot. If they jump at you, push them back down with a firm "no" and again ignore them until they are calm.