<p>My S is a junior and thinking of being a science major in college. He took AP Calc BC as a sophomore (5 test score) and then, rather than doing AP Stats, he went more rigorous and took the JHU CTY online Linear Algebra class, which he’s getting an A in. His senior year, he’ll take the online class in Multivariable Calculus. CTY has been around for a long time, so I believe most major universities will be familiar with their “product” (classes.)</p>
<p>FWIW, my H, a math professor, says Linear Algebra is often used as a “weeder course” for engineering students.</p>