I live in the UK and we do things a bit differently. I'll lay it down for ya.
Primary School (Ages 4-11): Basic Maths, English, Science and other compulsories - similar to you elementary school.
Secondary School (Ages 11-16) Higher Maths, English Science with a lot more subjects added. Option to choose three subjects to study in exams plus the core ones (Maths, English, Science, PE, RE, Citizenship). I chose: Geography, IT, Resistant Materials. This is similar to Middle School and the first two years of High School for you.
College & Uni - Self explanatory.
I'm currently in my fourth year of secondary school - my tenth year in total at school and I'm planning on going to College and Uni (They're different here)