senior high school age

At the age of five or six, the children attend elementary school (also known as grade school or grammar school), which last six years. The fist year at elementary school is called kindergarten.
In the USA, children start school when they are five or six years old. Depending on the state, schooling is compulsory until the age of 16 or 18. Children younger than five can go to a nursery school or preschool.

All instruction in Chinese schools is in Mandarin Chinese.
Core subjects such as Mathematics, Chinese, History, Geography are taught from Primary 1.

Boarding School
Boarding Age 7 – 13

References:

http://academic-asia.co.uk/CHINESE%20EDUCATION.htm ^(https://bannerad-design.com/goto/http://academic-asia.co.uk/CHINESE%20EDUCATION.htm)
http://www.britishunited.net/en/school_summary/senior-school/ ^(https://bannerad-design.com/goto/http://www.britishunited.net/en/school_summary/senior-school/)
http://www.gov.uk/schools-admissions/school-starting-age ^(https://bannerad-design.com/goto/http://www.gov.uk/schools-admissions/school-starting-age)