<p>Martie:</p>
<p>Exeter went out of their way to help kids like Tiankai Liu in taking courses past Linear algebra and vector. Groton and Andover has done similarly in few other subjects. Prep school will also bend backwards if you need to take any courses beyond what they offer and you have an interest in it. One has to exhaust the most challenging courses offered in the subjects, before prep school offers you an alternative.</p>