Joel Klein recently announced the number of teachers in the Absent Teacher Reserve (ATR) pool, including a breakdown of teachers by years of service. One common question is how these numbers compare to the overall distribution of active DOE teachers. Using information from the DOE, I found that younger teachers are underrepresented in the ATR pool at 13 percent versus 29 percent of active teachers. Teachers with 15 to 25 years of service are overrepresented in the ATR pool, at 31 percent versus 19 percent of the active teachers. The current breakdown of active teachers in the DOE as well as the breakdown of teachers in the ATR pool are shown in the pie charts below.