As far as I know, some form of American English (divided into reading, spelling, writing and vocabulary in the early years) is required throughout high school here.

Yes, and usually at least 3 math classes, 2 science and 2 social studies. Civics, gym and health classes are also generally required. Most? colleges also require a foreign language (usually 2-3 years worth) and some form of fine arts class too (band, choir, art).