If you assume that you have a dog that trains as easily as a Golden Retriever or Labrador Retriever, think again. Borders are terriers . Terriers by their very nature tend to be difficult to train. Add stubborness to intelligence and you have some work cut out for you. They do tend to be easier to train than most terriers but terriers, in general, are very challenging to train.
Borders respond best to motivational training where positive reinforcement is used heavily.
Relying only on negative reinforcement will not work with these dogs. They love and need praise for their work. They are easier going than most other terriers and will listen to commands, if they think you've asked them nicely. However, they don't respond to bullying style training as can commonly be misunderstood by trainers assuming that one terrier is the same as the next. Never pass up the opportunity to go for a joyride.