First, you need to realize that in the US, there is no uniform curriculum. What is taught is determined on a state by state, county by county, city by city or even school by school basis.
University admissions departments must have a really hard time of it then!
In the US there is an additional issue. Since the majority of the schools are publicly funded, there is NO religious classes or courses at all.
How come there are no comparative religion courses? I understand that the seperation of church and state is important in the USA, but I wouldn't have thought comparative religion courses would fall under that umbrella as long as they were truly unbiased. Is it that people who ARE religious don't want their children being exposed to "harmful" knowledge from other faiths?