Wow...never thought it was that different.
We have:
Elementary school lower level: grades 1-6
Elementary school higher level: grades 7-9
High school:1-3(or 10-13). Although the average time you are there is like 2.5 years.
University:3-9 years or something.
You still do A-Levels though right? After GCSEs.
So yeah to keep it simple, I'm on my second, and last, year of A-levels.