Many of us converts were, as mentioned, already homeschooling. A practice that has not caught on within historicaly ethnic based parishes. Here in the south eastern states and along much of the seaboard, one is very blessed indeed to find an Orthodox church at all! Let alone one of the person's chosen jurisdiction. The more ethnic the parish already is, then education is about (typically) blending into American culture at large as soon as possible. This idea has passed to the successive generations, and doing anything outside of that 'norm' is considered bizarre. Standing out even more than they do as Orthodox is a no no.
Since I already stand out, I have no issues such as this. Kinda hard to hide seven children and one special needs child on top of that. My guess is that parishes are loathe to start a school that isn't just one jurisdictional cross section, with their cultural identity sewn in part and parcel. Greek schools much teach hellenic culture, modern Greek language, greek dance and so on. Obviously a Russian family isn't going to be terribly interested in that and the Greek families will be no less interested in learning Russian. Since none of them can separate their cultural identity, VOILA-we get no Orthodox schools. And even if we did, they would no doubt be in major metro areas where I for one do not choose to raise my children.
so we homeschool and push and cajole folks into writing Orthodox curriculum, while we struggle to learn enough of the faith to participate!