4 . A choir teacher is a music teacher who specializes in helping students learn to use their voices in an ensemble (合奏) setting.     1     He or she also teaches students skills for managing the sound one produces and interacting with the other singers in the choir.

Like other teachers, choir teachers in public schools are required to be certified by the state in which they teach. Choir teachers frequently have other music skills.     2    

In some schools, all students attend a choir class, while in others, choir is an elective (选修课). In the first case, many of the students most likely have no special training.     3     In the second case, students may have both a particular talent for singing and an interest in devoting time to learning how to do it better.

Within choir class, the choir teacher helps students warm up their voices, learn singing techniques, and learn specific songs that he or she has chosen as appropriate for the specific voices.     4     Meanwhile, older students learn to sing in parts that are appropriate to the range of their voices, which the choir teacher determines.

    5     He or she may teach at many schools in a district or in many districts. In addition, the choir teacher may give private voice lessons within the school day as an elective, or outside of school. Coaching students who have a lead role in a school musical and rehearsing the chorus singers is another role that may fall to the choir teacher.