<p>I’ll also second CTY, MathCount and will also recommend participating in </p>
<p>[Welcome</a> to the Math League](<a href=“http://www.themathleague.com/]Welcome”>http://www.themathleague.com/)</p>
<p>CTY actually allow 7th and 8th grader to take SAT I and if she score above 700 then she can join the select 700 club.</p>
<p>AMC8 is another examination that she should certainly take during the 6th, 7th and 8th grade and if she can score high on it she will be invited to take AMC10 and then AMC12 and then invitation to participate in International Math Olympiad by appearing for USAMO.</p>
<p>Congratulations! Your niece certainly has capabilities to make it to the US Math Olympiad and should give it a shot.</p>