Teachers often cite working conditions as a bigger concern than money. This is particularly true in big cities, where new teachers are assigned the toughest classes, often with little support or guidance. Nationwide, more than 20 percent of new teachers quit within the first three years. Mr. Riley said last year. He has encouraged school districts to establish mentoring and other programs to help inexperienced teachers.
Shortages are particularly acute in certain subject areas.
Two-thirds of U.S. school districts say they need more math teachers. More than 8 school districts in 10 report an immediate need for special-education teachers, according to a survey by Recruiting New Teachers Inc., a nonprofit group. Pressure on the schools for better results has also exacerbated teacher shortages. In the past, districts sometimes lowered hiring standards when more teachers were needed. But now, parents and employers are demanding that graduates be better prepared.