What is the progression through school in the US and in UK, (ages and stages)?

Question

In England we have,

foundation stage(3-5 including a reception class- only reception are full time)

Key stage 1 - infants, age 5-7 (year 1 & 2)

Key stage 2 - juniors, age 7 - 11 (year 3,4,5 & 6)

key stage 3 - secondary school, 11 -

I get lost at that point can anyone finish that for me?

What is the system in the US I here about high school and sophmores and haven't a clue what it all means.

Answer 1

KS4 ( 14 - 16 )  years 10 & 11

Then you have college or sixth form ( years 12 & 13 ) x

Answer 2

KS 3 - 11 - 14 [years 7 , 8 and 9]

KS 4 - 14 - 16 [years 10 and 11]

Answer 3

Elementary School

Pre-K: ages 4 and under

Kindergarten: ages 5-6

1st grade: ages 6-7

2nd grade: ages 7-8

3rd grade: ages 8-9

4th: ages 9-10

5th: ages 10-11

Elementary or Middle School

6th grade: ages 11-12

Middle or Intermediate or Junior High School

7th grade: ages 12-13

Middle or Intermediate or Junior High School

8th grade: ages 13-14

Junior High or High School

9th grade: ages 14-15 also Freshmen Year

High School

10th grade: ages 15-16 also Sophomore Year

11th grade: ages 16-17 also Junior Year

12th grade: ages 17-18 also Senior Year

For grades 6th through 9th, the reason for the different types of schooling depends on the district and how the grades are clustered in the schools.

An elementary school may go from Pre-K to 5th or 6th.

Middle schools are 6th to 8th.

Intermediate schools are 7th to 8th.

Junior High schools are 7th to 9th.

High schools are 9th or 10th to 12th.

The Freshmen, Sophomore, Junior and Senior years refers to 9th, 10th, 11th, 12th grades respectfully.