At my campus we start flute,clarinet, saxophone, trumpet, trombone, and percussion. 3 directors, each teaches their area of expertise. There are 3 periods of each class woodwind, brass, percussion. We decide who switches to other instruments based on those that have proven themselves to be the hardest working/most responsible. As an example we will switch trumpet players to horn going 1st, 3rd, 5th, and 7th chairs one year and 2nd,4th, 6th, and 8th the next school year. We will sometimes start students on color instruments if they have had siblings come through the program or if they are the child of a teacher on campus or other district employee that we know we can count on. Percussion class is the only homogeneous class.