As I said, from my hearing of a radio report (in the car). What are the right numbers?
Using older numbers, there are about 400,000 students to approximately 23,000 teachers. The student teacher ratio was about 20-1 for 2010, but that includes special ed classrooms that are much smaller.
The statistics for 2012 enrollment are not readily available. A census should be undertaken for 9/4/2012 in a few weeks.