<p>MathPath, CTY, and EPGY are pretty decent… have heard of FLSV but never used it, though I must totally recommend ArtofProblemSolving for their relatively cheaper curriculum, and better staff. All of their teacher’s are professers or Masters in top mathematical schools like MIT, Harvard, Harvey Mudd etc…</p>
<p>and they will be able to send a math recommendation even grades for you, they are an amazing organization and they host the top matheletes around the world, with their math olympiad training,</p>