With my DD4 (April b-day), we did Kindergarten a year early at a private school that was an extension of a preschool program. When she turned 5 and went into a public school, we had to put her through a Kindergarten TEKS acceleration test that required 90% or better in Reading, Language Arts, Math, Science, and Social Studies in order for her to go into 1st Grade and skip public Kindergarten. (TEKS testing has a very slim pass rate for all 4 subjects. Try to imagine six hours of testing in a single day on four subjects!)
She was accelerated and put into 1st Grade with children 1 to 3 years older than her (red shirting is popular in our area). She was ranked #1 in 1st Grade class, so curriculum was not the issue.
In this process, the only issues we ran across was in P.E., where our DD was not physically cabable of doing everything that older kids were, but she quickly caught up.
We did incur a lot of "but she is so young" when speaking to the teachers, but age did not matter in her case.
The one thing that I did notice with our DD was that her writing (fine motor skills) were not as good as some of the older children, but that seemed to be her only deficiency and has improved drastically with age.
My suggestion to you is check with your local school for acceleration criteria and get written guidelines. The schools are reluctant to accelerate the kids b/c they want higher test scores. If they discourage the acceleration, ask them what the process is anyway and go for it. Good luck!
