Every breed of dog has its own general temperament, unique to the breed and to the individual. Just like different people learn best in different settings, Wheatens also generally learn better using certain training techniques.
The best training classes teach you why to do what and when to do it. The class should not taught by formula… one size does not fit all! Ideally, your class will include reading a dog’s body language and behavior. Even more importantly the class should teach timing of reward and correction. Knowing when to praise, correct, or give a treat is a key to successful training. This is very difficult to learn on your own and you’ll develop the knack in a good training class.
…and most important
You have the absolute right and duty to stop any instructor from doing anything that you feel is harmful to your dog or causing your dog distress.