As is a course in British higher education, which means that British students need to be tested before entering universities. As course in Britain is equivalent to senior high school course in China, but different from senior high school, as course only lasts for two years, the first year is called ASLevel, and the second year is called A2Level.

As courses mainly include 66 courses including English language and literature, mathematics, physics, biology, chemistry, history, geography, economics, music, modern foreign languages, business, accounting, film and television media. Harvard, Oxford and other famous British universities will also take the results of as courses as a reference when enrolling students.