I wasn't sure where to put this.
For starters, welcome to the board. We are pretty slow at the moment but there are still some great contributors here.
If it were me, I'd be pretty vague in that letter and say with you want without suggesting that she's not getting it yet. Give general information just like you said "DD does well in a structured enviroment" and "DD really enjoys the art/music/P.E. program." For concerns, go for the emotional impact and not include your own theories as to why... "DD has been frustrated and sad about school." Of course, only if this is true. What exactly has your child said about the program? Is she happy to go or making excuses to stay home?
Something to keep in mind, these teachers may not be keeping with the structured vision of the school but I wouldn't say they aren't doing what they are supposed to be doing as preschool teachers. Preschool teachers are supposed to allow for lots of down/free time. It's developmentally appropriate as most kids this age still learn primarily through play. Yes, the kids do better with some sort of steady schedule because kids that age don't often have a good sense of time and mark their day based on activities. Some would be very agitated if suddenly outdoor time was before lunch instead of after one day (especially if mom always comes after outdoor play and this one day she doesn't because it's at a different time!) In that way, there should be structure. Structured learning is something typically reserved for older children though. Just keep this in mind when talking to the teacher.... what she's doing isn't neccessarily "wrong" in the eyes of early childhood development.... It's just not working for your own child. When you ask for help, you are asking for the "exception to the rule" as opposed to suggesting they aren't doing right by the whole class. Recognising that your child is different will allow you to talk about what your DD needs without making any personal accusations.
I think turtletime has a lot of wisdom in there. I agree about staying vague yet honest ... but without using the word "bored," which tends to be taken very poorly by teachers.
Miranda in rural BC, Canadamom to three great kids and one great grown-upunschooler, violist, runner, doc
I really like Turtletime's suggestions as to how to complete the form for th teacher.
As a parent of a gifted child and a gifted educator, my advice to you is to just be honest with your child's teacher.