Answer:
Some students are just learning to play a band instruments as they start middle school and others have been playing for a couple of years. Just when they think they know what instrument they want to play or are really happy with the have been playing Mr. Craig asks them to switch to a different instrument. Why would a teacher ask this of a student? It's because the teacher wants to have the best balance of instrumentation in the band. In elementary or beginning band the level of band arrangements is very low (grade 1 we call it). Almost the entire band plays the same pitches at the same time. There is very little harmony or counter melody as we call it, pretty much everybody plays the melody. By the time they get to the end of the 8th grade we try to have them playing grade 3 level music. Grade three is considered upper middle school, lower high school level music. Look at he difference in the individual parts that are used at each level.
Step-by-step explanation: