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DH says that you don't notice a difference maturity wise in K. 1, 2, 3, 4 grades - But you definitely see a difference in maturity when the kids start hitting 5th, 6th grade and are hitting puberity.Not one person I have ever spoken to has regretted their decision to send their child to K later rather than earlier.
BTW: That is an EARLY cut off!
Here it is in Oct. but in CA it was Dec. 6th!
Dawn

What does her Prek teacher have to say? Our twins are right around the cutoff for our area. There is no way I'd not have them both in Kinder. this upcoming school year. For us, we know they would not be challenged sufficiently if we waited, and would both be behavior issues due to boredom if held back (our son would act out and be "picky", our daughter would be too social and chatty and distract others). Their current teachers, when I asked this spring at conferences told me that they were kindergartners, and are already doing some of the kinder. work now. We choose a private Montessori school, so they could work at their ability (despite their calendar age), and plan to keep them there for at least next year. They were also invited to attend kinder. at a different private school (one for gifted and advanced students). We weren't getting support from other private schools and the public school is anti-starting for summer b-days....without even meeting the students, let alone evaluating them for readiness.
So, my point....her teacher(s) would have a good feel for her abilities, both social and academic.
I teach Kindergarten in a local public school. Our advice is usually to wait if you can, even with birthdays that fall just before the cutoff. Your child may be very smart, but we look at far more than academic ability in Kindergarten. Both social and emotional maturity are very important as are motor skills.Keep in mind that kids are growing up way too fast these days. Upper elementary and middle school students are engaging in activities I didn't even hear about until high school. If your child is one of the younger ones, peer pressure will most likely be harder to resist. A good teacher can accelerate the curriculum to keep your child challenged, but we cannot change the social atmosphere of the classroom.
P.S. A note not to this poster, but to all parents of upcoming Kindergarteners. Please do not walk in the school saying your child is brilliant, gifted, an amazing reader, etc. Even if you are right, the teachers will probably not believe you. If I had a dime for every parent that said these things, I'd be staying at the Poly instead of Sports. Give the teacher a chance to see how great your child is. Wouldn't you love it if she called you saying, "Wow, ***** is so smart!"
The immaturity was not as noticable in k-5, but it really came up once he hit MS(6-8 here).
If he's almost 12 months behind in development, he could be a bit slower. Now I know there are kids all over the cognitive development continuum, but I still think that if it's a concern we can identify now, we should plan for it by taking actions today if possible.
Everyone else we've discussed this with always advises us to start him later. This includes our pediatrician, our private speech therapist, even some of DD's teachers. While I'm open to the possibility of starting DS in K next year, I truly believe that it must be a decision that DH and I are comfortable with for DS's best interests. After all, he's our child, right?
I'm certainly not saying to wait til the end of the school year to say anything. Just give the teacher a couple of weeks to get to know your child, and do the begining of the year assessments. Then if you are getting the feeling your child isn't getting enough contact the teacher.
The problem is that so many parents say these things upon first meeting me and then when the child enters my class, they are not as advanced as the parents have led me to believe. If your child has been evaluated by an oustside source, I would definately present that to the teacher. We love having information like that.
Remeber, you know your child best, but Kindergartens around the country can differ greatly. I would try to talk to someone at the school about what goes on in Kindergarten. Kindergarten is much more academic than many people are aware of.
I think it has gotten WAY out of hand. In my BFF's school district the cut off is Sept 1 and her DS birthday is Sept 14. She doesn't even have the option of sending him to Catholic schools for a year because he needs to be 6 by Sept 1 to start first grade.
I think moving the cut off date earlier and earlier is really doing a disservice to the kids who are more advanced (I was reading before K and had to start a year later than when I was ready, but at least the cut off date was December 31 when I was younger).
Not only do they want you to start school later, then the parents who pushed for the older starting age start pushing for more "real" education in K, thereby making it harder for the less developed kids, thereby having parents push for the older starting age. It is a viscious circle. If it gets too out of hand by the time I have children in school, I may just home school them.
Stepping off my soapbox now.

our cutoff here is 9/1...my DD's birthday is Halloween, so she'll be 5 turning 6 next year when she starts.
For her, it's a shame, her entire preschool class will be leaving to go to K and she'll basically be repeating this last room in her school again.....most all of the kids there are on the same level even though their birthdays are just a few months before hers.

Here in PA the cutoff age is ONLY for K. So if you feel that your child is ready even though they aren't 5yo by 9/1... you can enroll them into a private K program and then they can attend 1st grade in the public school, no matter their age