Almost half of National Education teachers work at public secondary school level. This profession has suffered a significant decrease in its workforce since the mid-2000s, while the number of pupils remained relatively stable. The conditions of the profession have been affected: the number of pupils per class has increased, as well as the use of overtime and contract teachers. The 380,000 public secondary school teachers were divided into several hundred disciplines and different statuses (aggregated, certified, vocational high school teachers, etc.). These characteristics partly determined the number of hours of lessons they had, their pay, the type of institution where they taught and the classes that taught, from the start of secondary school to post-baccalaureate. Careers were often started in more unpopular positions. Nearly one in two teachers started early in their career in the Paris suburbs and were often assigned as replacements or to priority education areas. Entry into the profession generally corresponded to longer lesson preparation times. Gradually, teachers became more geographically stable and their wages increased. Anticipation of sometimes difficult working conditions, especially early in the career, probably contribute to recruitment difficulties observed since 2011. These have been accentuated by the increase in graduation requirements for entry into the profession since 2010.