Curiousity has me....
How is the school system set up in England?
Parents are required to arrange an education for all children from the school term in which they have their 5th birthday to the end of the school year in which they turn 16. There are currently proposals to extend this to 18.
They do not have to attend state schools (or any schools, actually) to achieve this, but the vast majority do.
Many children begin school in "Foundation" at around age 3.
School years are counted as follows:
--------- Primary School -------------
Reception: School year of 5th Birthday
Year 1: 6
Year 2: 7
--------- Middle School ---------------
Years 3 - 6 (age 8 to 11)
--------- High School -----------------
Years 7 - 11 (age 12 to 16) Options to extend to 18
--------- College or University ---------
Vocational Qualification, Higher Study or Degree
(typically until around 21 - longer for "professions" such as medicine, etc.)
What levels correspond to US high Schools? What levels correspond to college? I teach at a community college here in the states, basically freshman and sophmore year, does the UK have a similar system?
Our school age transfers are different to yours see above.
What requirements are needed to teach at the high school level or intro college level, in terms of certifications needed or degrees needed? Is it the same for private schools and public?
To teach in state schools, a specific teaching qualification is required which is essentially post-graduate. Generally a teacher must have a Degree in a "National Curriculum" Subject. The Independent sector (what you'd call Private Schools but we call "Public Schools" for historic reasons) can employ on whatever basis it wants.
Oh and everyone in the UK who works with children - as a school teacher or like many of us on this site as volunteers doing such things as refereeing the occasional schools rugby match - has to be checked against our central "Criminal Records Bureau" ("CRB Enhanced Disclosure") to ensure they have no record of any offences or even suspicions of involvement with child abuse.
There a lot more here:
Becoming a Teacher:
http://www.tda.gov.uk/Recruit.aspx
The English "National Curriculum"
http://www.curriculumonline.gov.uk/Default.htm