Via National Center for Education Statistics
Public school systems will employ about 3.1 million full-time-equivalent (FTE) teachers in fall 2015, such that the number of pupils per FTE teacher—that is, the pupil/teacher ratio—will be 16.0. This ratio is the same as the 2000 ratio. A projected 0.4 million FTE teachers will be working in private schools this fall, resulting in an estimated pupil/teacher ratio of 12.5, which is lower than the 2000 ratio of 14.5