[header] How to get into a boarding school [title] Get good grades. [step] It's important to get good grades all through middle school, many of the top boarding schools (tenschools.org) require straight-a's (or very close to it). [title] Make sure you are prepared to take the ssat. 
[step] If your ssat scores aren't great, it will really hurt you. Most schools expect you to have pretty good scores and if yours aren't, they might not even read the rest of your application.