We are currently living in London where they start school a year ealier. So my son started K when he was 4.5 yo, he is now almost 6.5 yo and finishing 1st grade. However, when we move to Plano ISD this summer he will be put back in 1st grade there due to his January b-day. We debated skipping a grade and moving him to 2nd grade when he starts in September.
We did call around to a couple of private schools to ask if they would test him to see which grade he should be in, with the thinking that we could manage paying the fees for one year then move him to public school the following year. Both schools I called said they had to follow the Texas rules for b-day and he needed to be 7 to start 2nd grade. One school said they could test him but they very rarely ever moved kids up to skip a grade.
So, now PISD has told us we can ask at the start of the school year about PACE (their gifted program) to get him enrolled in that. If we still want to have him tested for 2nd grade they will do an assessment and see where he falls academically.
Since we have a son we are thinking more about keeping in his age group, for maturity reasons and also for sports when he gets older. Plus, I would prefer he be the smartest kid in class than to be struggling emotionally and with his school work b/c he is younger.
I do still worry he will be very bored though.