[Baron Grazic]

I beleive the Scottish Education system is much like Australia in the regards you seem to be talking about.
Pre-School or Prep (Prep in sometimes held at the Primary School or is in my State)
Primary School - First 6 years of Schooling.
High School - Next 6 years. (Now sometimes called Secondary College) Finishing at 17-18 years of age.

After that is University, College or just work depending on your choice.