She totally gets place value, up the thousands at the moment. We have briefly touched on regrouping and she seemed to get it but we haven't worked on it in depth. We're using Singapore Math and she likes it a lot, we had started out with MathUSee which gave her a decent foundation but was too dry for us. That's how she learned place value.
When I speak with the school and it is determined it might be best to put her in 3rd grade I would probably feel better for that but I'm pretty sure she'd be really butthurt over being held back from the grade she's "supposed" to be in.
I think she will probably be fine then, if she's got place value. It's just a matter of carrying that 1 on over in addition. If you can get her to where she's got an understanding of that, even if she doesn't master it, I think she could probably catch up in 4th grade. It sounds like she's halfway there already. If she were at a place where she didn't understand place value at all and had never heard of regrouping or was having a really hard time with it then I would consider 3rd.
There is a fair amount of redshirting that goes on here in our district, as a PP mentioned also happens in her area. A good friend of my dd's was held back by her parents when she first started K. Our cut-off is August and she had a summer b-day so by the time she started 4th grade she was already 10—a good 7-8 months older than your dd would be if she starts in 4th. She's very bright, too, but red-shirting is fairly common in our area, so not a big deal for her. If there would be a lot of 9 yr olds turning 10 in 3rd grade then I don't think it would be a bad fit necessarily. Is she high on the growth charts? That might factor, too. If she would be very small for 4th grade or very tall for 3rd that might play into it unless she's always been the smallest or tallest.
Edited by beanma - 8/26/12 at 8:57pm