what age do you finish high school

If you turn 16 during the school year (between 1 September and 1 July) you can leave school after 30 June.
If you turn 16 between 1 March and 30 September you can leave school after 31 May of that year.

This initiative explores ways to create a more student-centred and responsive high school environment.
This framework seeks to address the challenges students face in finishing high school.

If you are a 1st time user, just go
Between the two Countries, US has a lot more choices in terms of Majors/Degrees, but are a lot more expensive than UK. (International Students cost even more)

At eAchieve we don’t believe in letting circumstances get in the way of receiving a quality education. Finish your high school diploma online to move on to bigger and better things!
The flexible environment of our free online school is ideal for students looking to complete their high school education and earn a diploma online. eAchieve Academy is the perfect solution for students who may have circumstances making it difficult for them to complete their K-12 education at a traditional brick and mortar institution.

1. must be 19 years of age or over at the time of enrolment in school division/district or ALC programming directed at completing the Mature Student Graduation Requirements, or reach the age of 19 before completion of the course(s) in which he or she is enrolled
2. must have been out of school six months or more, and out of school long enough for the class, of which he or she was last a member, to have graduated from Senior Years; and
3. has not obtained a high school diploma.

• Distance Learning, telephone (toll free in Manitoba): 1-800-465-9915
• a Manitoba high school or
• an Adult Learning Centre

References:

http://www.alberta.ca/finishing-high-school-and-academic-upgrading.aspx
http://interstate.co.jp/en/news/chip/graduation-age
http://www.eachieve.com/HowOnlineHighSchoolWorks/FinishDiplomaOnline
http://www.edu.gov.mb.ca/k12/policy/mat_student.html
http://www.teachin.co.uk/teaching-overseas/uk-school-terms/