The retirement of thousands of baby boomer teachers coupled with the departure of younger teachers frustrated by the stress of working in low-performing schools is fueling a crisis in teacher turnover that is costing school districts substantial amounts of money as they scramble to fill their ranks for the fall term. Superintendents and recruiters across the nation say the challenge of putting a qualified teacher in every classroom is heightened in subjects like math and science and is a particular struggle in high-poverty schools, where the turnover is highest. Thousands of classes in such schools have opened with substitute teachers in recent years.
See "With Turnover High, Schools Fight for Teachers", Sam Dillon, The New York Times, August 26, 2007