In 2013-14, 42,050 full-time equivalent teachers left service from state funded schools in England. Of these teachers, 10,500 retired with an award of pension benefits. In the same year 44,900 teacher entered the profession. In 2012-13, there were 44,400 entrants and 39,050 leavers, of which 11,230 retired.
There is no fixed retirement age for teachers but the normal pension age for Teachers’ Pensions is either 60 or 65 depending on when the teacher last entered the profession.
Information on the number of teachers entering and leaving service from state funded schools in each year is published in table C1b of the additional tables in the School Workforce in England Statistical First Release, November 2014. The table shows entrants and leavers for each year from 2010-11 to 2013-14. This publication is available at the following link: https://www.gov.uk/government/statistics/school-workforce-in-england-november-2014