While the pet's intelligence or knowing the steps on how to train your pet with the basic commands is very important, there is another factor that can contribute to the success of Jack Russell training. This contributing factor is no other than consistency. Being consistent when training your terrier can prevent confusions that, if not properly addressed, can later lead to various dog problems.
Consistency in dog training means you've got to replicate or keep doing activities or training procedures that may help your excitable pets understand what you expect him to perform. Let us take like jumping up on people, your jack's behavior problem.
Waking up to a Jack Russell is a terrific way to start. But do you believe you would have the ability to keep that mood once you dressed to conquer once your pooch jumped up on you? Probably not, right? Dogs can see black and white, no grey areas in between. If you do not want your pet to do something prevent him from doing it then and there.
You can't make a dog understand that it's alright once you are getting your nightwear on, to jump up on you but should prevent doing the same when you're wearing your power suit. It will lead to confusion that will lead to Jack Russell training that is ineffective.
Jack Russell terriers may be stubborn at times and do have high energy level it's important that they're faithfully trained with all the commands. Establish your pet targets and limits. That he'll understand what his position is in the pack, not a pack leader these limitations should be enforced.