<p>In addition to the classes expected by colleges such as Harvard for all incoming freshman, most US states also have minimum requirements for high school graduation, with certain classes in certain subjects also being a requirement. So there is some flexibility in choice of classes, there is also a basic core of courses that must be taken by all students. However, the expectations of a selective college like Harvard will almost always be much more demanding than the minimum state requirements for a high school diploma.</p>
<p>One thing to note is that Harvard admits a significant number of foreign students every year and is very experienced in judging equivalence and comparing the academic achievements from students from very different educational systems and backgrounds. Of course the SAT helps to standardize that, but it is only one component of the mix. </p>
<p>Regardless of the system the applicant comes from, Harvard will always want to see that you took the most rigorous courses available to you. That you took full advantage of the opportunities that you had. Not all US high schools offer AP classes, so obviously those students won’t be taking any. But if AP is offered then students better take them if possible.</p>
<p>So be sure you have taken the most demanding courses available to you, and Harvard will assess you accordingly. You will not be penalized if you have no US-style AP courses available.</p>