The study addressed the problem of recurring technical and musical errors exhibited by students in their private lessons. In an effort to remedy this problem, an attempt was made to structure the entry and exit environment of the private lesson in such a way as to increase the improvement in performing skills by scheduling thirty minutes of practice immediately before and immediately after the private lesson. The purpose of the study was to determine the effect on growth in performing skills (as measured by sight performance) of this arrangement called the Structured Border Lesson (SBL).