Hi guys, In a few weeks my son will be coming to San Antonio, TX, for a year under the AFS (American Field Service) program for his 11th grade. Can someone please help explain the high school system in the US? For your understanding, here, in Thailand, school students will go through a pre-set, no choice, no option course. It seems to me that in the US there are electives. What are the basic 'compulsory' courses? etc ... BTW, what's the climate in San Antonio like? Thanks in advance.