We are planning to move from Belgium to the US East Coast. Because we are not sure if we want to come back to Belgium ever again, it’s difficult to choose a high school for our son.

If he enters in 10th grade, will it be possible to graduate officially in the American school system (because of the graduation requirements that assume that you took 4 years of courses)?

What are the advantages of a school that offers lots of choices in Advanced Placement? Or would it be wiser to choose for a school that offers International Baccalaureate?

Other things we have to keep in mind?