<p>I agree that the concept of "safety" is generally speaking a concept best left for college admissions where the failure to gain admission to any college at all means you're in big trouble. </p>
<p>By contrast, failure to gain admission to BS simply means you're going to avail yourself of other alternatives: the school you're currently attending, a public school, a private day school option, or possibly home schooling. Thus, you already have safeties. In fact, nearly everyone has at least one "lock" (public school) and your BS application choices should be of such a calibre and fit that they exceed your non-BS "lock" and "safeties." Then, factor in the cost components of BS (not just financial, but travel/distance, other stresses, etc.), and I submit that your BS options ought to offer advantages that exceed your local "lock" option by a longshot. </p>
<p>Of course, many boarding schools do that if you bear in mind that you're not comparing apples to apples. There's a full array of offerings and experiences available bundled with BS that isn't part of the local day school experience. How much you personally value these experiences may determine whether BS is so important. For the most part, though, these other offerings and experiences, as rich as they may be, are not things I would regard as "needs" for a student. That's why, for the most part, I don't see any need to keep any "safeties" on a list of boarding schools you apply to. </p>
<p>Be realistic in what you shoot for. But don't apply to any schools that are anything less than what you want. If one or more of those schools have a high rate of admission, that's terrific. It probably means you're ahead of the game because you're focused chiefly on what you want and you aren't letting the tail of admissions competitiveness wag the dog of which schools will best suit you as a student and member of the BS community.</p>
<p>As for the number of schools you finally decide to apply to...that's largely a factor determined by your intestinal fortitude for application processing and your parents' willingness to pay $100 or so for each fishing line you cast when, in the end, the most you can keep is one fish. Recommendations and school reports are replicated by the photocopier...so that shouldn't deter you. </p>
<p>What should keep you in check is the fact that a large number of options should tell you -- and may tell the interviewers who ask you where else you're applying to BS -- that you may not have a very clear idea of what you're looking for out of a BS.</p>
<p>In this regard, returning to my point about you already (probably) having safeties and at least one lock for next year...I would be amazed if (even with unlimited time and other resources) you could find 20 boarding school options that are so exceptionally well-suited to you, individually. I know some people apply to as many as 10, but even that stretches credulity. My son applied to less than that and, in retrospect, I realize it was as high as it was because we were so clueless about so many things. Fortunately, you can only actually attend 1 (at a time) and, as a rule, I think admissions officers can sometimes save you from yourself if you start grasping at straws (which includes applying to "safeties" and absurdly out-of-the-question "reaches" as well as other schools you would have no business attending even if, on paper, you could gain admission).</p>
<p>As long as you work hard to create a list of schools that you believe seem custom-made for the type of student and person you are and are growing into, your list should pretty much shake itself out of its own accord without your having to resort to a mathematical expression for "reaches," "safeties" and "matches" -- the latter term being abominable in that it refers to nothing other than admission prospects yet the word is suggestive that such schools hold some additional kismet or magical attractiveness with you as an individual that very likely does not exist (i.e., a "match" does not a "fit" make).</p>
<p>Good luck!</p>