Obedience class if you havent already been, or even a refresher would be nice. She needs to learn her commands under various situations, and Obediance classes are great for that! Like someone else suggested, a retractable lead, will allow you to klet the dog go a distance, and for you to practice your recalls. Please do not allow your dog off lead, untill she is 100% on recall, and unfortunately, some terriers, never get 100% recall. so good luck!