The share of teachers who stay has slightly decreased over time while the shares who either switch schools or quit have slightly increased: Percentage distribution of public school teachers by stayer, mover, and leaver status, various years

Stayers  Movers Leavers
 1994–1995 86.3% 7.2% 6.6%
 2000–2001 84.9% 7.7% 7.4%
 2004-–2005 83.5% 8.1% 8.4%
 2008–2009 84.5% 7.6% 8.0%

Note: "Stayers" are teachers who were teaching in the same school in the current school year (the year for which the survey was conducted) as in the previous year. "Movers" are teachers who were still teaching in the current school year but had moved to a different school after the previous year. "Leavers" are teachers who left the teaching profession after the previous year.

Source: Authors' analysis of NCES (various years).

View the underlying data on epi.org.