Jim has been in and out of foster home's. He's a troubled young man
(He's in one of my classes...)
Two weeks later Helmholtz goes back to conducting his music class was one of the worst high school bands. Jim uses Helmholtz trumpet which was now repaired as so was Jim's heart
Helmholtz noticed Jim was not fitting in well with other students and tried to guide him in the right direction
Jim completely destroys a teacher's room and Helmholtz catches him in the act
As a result of Jim's action's Helmholtz offered his most prized possession to show Jim that he cares for him more than he cares for his trumpet. Jim cannot bring himself to destroy the trumpet and this shows that he is becoming aware of his past mistakes.