Teachers may become administrators or supervisors, although the number of these positions is limited and competition for these desirable positions can be intense. In some systems, highly qualified, experienced teachers can become senior or mentor teachers, with higher pay and additional responsibilities. They guide and assist less experienced teachers while keeping most of their teaching responsibilities. Private school teachers generally earn less than public school teachers. In some schools, teachers receive extra pay for coaching sports and working with students in extracurricular activities.
Some teachers earn extra income during the summer working in the school system or in other jobs.
Overall employment of kindergarten, elementary, and secondary school teachers is expected to increase about as fast as the average for all occupations through the year 2006. The expected retirement of a large number of teachers currently in their 40s and 50s should open up many additional jobs. However, projected employment growth varies among individual teaching occupations. Employment of secondary school teachers is expected to grow faster than the national average for all occupations through the year 2006, while average employment growth is projected for kindergarten and elementary school teachers. Assuming relatively little change in average class size, employment growth of teachers depends on population growth rates and corresponding student enrollments.