I'm not homeschooling, but I have a friend that will be starting with hers soon (they do some things now, but it will become more intense once the school year begins in the fall). One of the things she had talked about using was something called Handwriting without tears. I haven't used it (my kids just turned 3yo) so I'm still working on the correct grip. I see that Therapro.com (a site I have used before) has the Handwriting W/O Tears program and a few others. You might try looking there for ideas if not products. I thought the game with the play-doh looking stuff that you roll and then shape into the letters looked pretty cool, but you probably could do that with what you already have, and maybe just incorporate that into some of her playdoh time, kwim?