Hi,
I'm a preschool teacher (14 years now) and have advised parents on this issue many times. What did her teachers say about her progress and maturity? Did they comment on her attention span during activities and her social/emotional maturity?
School readiness involves so much more than letter/sound recognition. I disagree with what another person posted that kindergarten is basically unstructured .. I can't remember the exact words but something along the lines that the kids get a lot of free time or something like that. I can tell you that is not true. My son attended full day kindergarten and in the afternoon there was some time allowed for stations where they kids could go and do some unstructured exploring but basically now a days, kindergarten is VERY structured and the children are doing what we used to do in the 1st grade..
basic math and a lot of reading/phonics activities. There is a lot of seated/worksheet type of activities and working in groups with other children.
I'm not sure what type of preschool you sent her to, hopefully she did have a lot of free time to play and make discoveries which is very appropriate for her age. Many preschools though at the 4'5 year old level also include much more kindergarten readiness skill building too as a result of this pushing down of the 1st grade curriculum. Early childhood educators don't feel its appropriate but we do our best to provide the best of both worlds so to speak- provide ample time for learning and making discoveries through play and group activities and lots of fun pre-literacy,pre-k skill building.
If you should decide to give her another year, there are many preschools that offer a 5 day pre-k sort of class where she will have the opportunity to have another year to mature (if this is an issue) and work on pre-k skills.. (which no one has ever regretted holding back their child, especially younger children.. myself included with our own daughter and son.. the best decision we ever made) the kids in her kindergarten class will NOT care that she is a year older and they won't even know until they all are older anyway. Actually for my son, his friends have always looked upon him as a leader and very mature.
It has not be an issue with my kids..or any of the parents I have advised over the years.. (My two that we held back are 18 and 22 now and have done great in school)
What she could possibly struggle with is if she is immature and unable to focus for a reasonable amount of time.. (she should be able to focus long enough to do a simple worksheet..print her name even if it isn't that legible..)
listen at circle time 10-15 minutes long for example, take care of her personal belongings, share with other children, these are typical readiness skills..) hopefully she has experienced a structured circle time at school and had exposure to these types of activities..)
hope my comments help in some way..
good luck with your decision. Feel free to email me if you have other questions..