What country are you from and do you call it 1) elementary, junior high, high school 2) elementary, middle school, high school, 3) primary, ???, secondary?
Fyi: it's called post secondary because, I think, UK calls it primary, secondary, and after that is post secondary.
From (the French-speaking part of) Belgium, 6 years of primary and 6 years of secondary. Nothing inbetween as that's already 12 years. Secondary usually happens within the same school although there are two divisions within it:
- programs are designed for three cycles ("degrés") of two years (D1, D2, D3)
- teacher's diploma follow a division in two "degrés" of three years : teachers for the inferior one (DI) have a bachelor and teachers for the superior one have a master. In the near future the diploma's will change but the distiction is mostly going to stay
In this latter sense, "inferior secondary" would be the equivalent to middle school and "superior secondary" the one for high school, although as I have explained it is not as separated as in the US, Italy, France or others. As someone who teach in the superior secondary "degré", I do usually introduce myself as a high-school teacher when talking to people from other countries.
Following the title, I forgot the little ones, so in total we have
- 3 to 4 years of maternal school (2,5 - 6 years old). Traditionnally only the last one was mandatory but this is currently changing so I don't know whether or not the whole of it is already mandatory for everyone
- 6 years of primary school (6-12 years old)
- 6 years of secondary school (12-18 years old)