Many studies have linked potentially vocally demanding vocations to high risk of voice disorders. Teachers are considered to be at high risk of developing voice disorders due to their professional activities and to their exposure to children who frequently develop upper respiratory infections. Teaching is also the most frequent occupation identified in voice clinic populations. The purpose of this paper is to describe the frequency, severity and kinds of vocal problems in teachers, and to clarify the factors related to vocal disorders among teachers. Vocal hygiene education programs will be useful in reducing vocal problems associated with teaching, and may need to be incorporated into the training and retention to teachers.