There are two sides of the physics teacher turnover equation: teachers leaving and teachers entering. This month we will focus on teachers' future teaching plans. As seen in the figure, about 5% of the 27,000 teachers who taught physics in U.S. high schools in 2008-09 were in their first year of teaching physics (but not necessarily their first year of leaching at the high school level). Of those, about 9% planned to quit teaching; less than 3.5% of the experienced teachers planned to quit at the end of the current school year. The higher attrition rate among first-year teachers is common across all high school teachers--and other careers--as people enter new fields and then leave quickly for various reasons. (Contains 1 figure.)