<p>My suggestion is to get feedback from trusted advisors at his current school. You don’t have to follow the advice they give - but you might get information that would assist in your decision. For example, the current school would probably be able to provide feedback on your son’s chances for next year (2011 start date) and what the admissions process would be like. </p>
<p>I agree with the comments that 10th grade admissions for Boston area day schools presents very low and unpredictable odds. It is not just the fact that schools may accept just a few 10th graders - it is that they are looking to round out a class and there is no way of knowing if your son has the attributes they prefer for that class.</p>
<p>My suggestion is to talk through a realistic set of options with your son. 9th grade at his current school may lead to his not being accepted to a 10th grade in any day school. The choices would then be boarding (if he applies and you support) or public.</p>