I don't think I've ever used the word unschooling with my family. The ones who are interested know we don't have any set curriculum, and may ask from time to time what ds is "doing for school." I just talk about what he is interested in at that time, and usually he'll run by and rattle off some interesting tidbit he found out recently. When that's not enough, and I get questions about methodology or plans for the future, I describe our style as project-based (we learn by doing), integrative (it's part of our daily life), and interdisciplinary (we don't divide things into neat little subjects). He covers all the basics through in-depth exploration of what interests him, and while he may not learn everything on the same time table as a traditionally schooled child, what he learns holds personal significance for him, and therefore he retains it better. My hyper-normal in-laws eat this stuff up because my description sounds a lot like the gifted program in the school district that their kids went to. My aunt (a former teacher) loves it because I'm emphasizing critical thinking skills (he chooses his own studies, researches, and solves problems independently) which she always felt was lacking in her older students, and everyone else seems okay with it based purely on the fact that ds seems to know and do a fair amount compared to his peers.
I wouldn't worry about her being old enough to tell people what she does with her time as being a giveaway to your rebellious, alternative, unschooling lifestyle. All kids talk about what they do only to the extent that it interests them, whether it's the cool projects or extracurriculars or the time they spend playing video games. Whatever she likes best is what she'll tell strangers, just like her schooled peers. If you ask a school-aged kid about what they did at school today, they don't come back with how many minutes they spent sitting at their desk or how many boring worksheets they did. They'll tell you the exciting stuff: social moments, computers, gym, art, science experiments...
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