Do you have any idea where you might be moving? That might help in terms of assisting you in finding hsing groups that would work well for your family. For instance, there is a really neat hsing cooperative founded by parents of gifted kids in Acton, MA:
http://www.voyagersinc.org/wiki/bin/view/Public/WebHome
I've been coveting their program for years and am trying to get something secular and similar up and going in Northern Colorado (we have all kinds of religious hs supplements, but not much for secular folks).
It does sound like budget is of concern, so I don't know if the options others have mentioned of hiring someone to watch her and hs her while you are working is a possibility, but if so, that might be your most flexible option.
The problem if you go with a preschool is that she would probably have to enroll as a kindergartener the following year (like you had intentionally held her out of K for a year) if you find that you need to enroll her in ps a year down the line. If you register as a homeschooler for kindergarten, she would at least be able to enter first the following year if you find that to be necessary. It sounds like it would be a better fit for her if you don't have her be one of the older kids in her grade if she is in school.
We, honestly, found that 1st grade was a harder place for an academically advanced child than kindergarten. Even though it is more academic than when we were kids, the teachers are still generally loving, sweet people who don't pressure kids who already know the material. My oldest didn't mind coloring numbers and singing songs about phonics even though she was reading going in, for instance. 1st grade was much more pressure and not nearly as good of a fit if you already knew the material. We took dd11 out of 1st grade in the last quarter.
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