We are leaving next week for our 4th WDW vacation with the kids and the fourth time we are taking one or both out of school to do so. The first trip we had a kindergartner and a pre-schooler. This trip they are in 5th and 2nd grades. All of our trips previously have been the week after thanksgiving but this year we are going the week before. The reason for this is, we can get their work from a classmate AFTER the trip so we don't have to ask for any special treatment from their teachers. They will also have a week to make everything up while on Thanksgiving break.
As far as excused/unexcused goes - I don't even try to pass it off as educational (even though I do think they can be, and the last trip we did "behind the seeds" at Epcot and it inspired our DS (8 at the time) to do a science fair project on hydroponics). We tell the administration what we are doing and then we do it and our kids have 5 unexcused absences for one marking period every two years. On the last trip we did 6 days out of school and we did get a threatening letter from the principal that we had exceeded the allowable unexcused days and you know what happened? Not a darned thing. I think it would be different if we did it several times a year -
Everyone needs to make the decision that is right for their own family and I completely respect other families making a different decision than we would. This time with our kids will be gone before we know it and I am so grateful that we can have such a wonderful trip with family (we alternate sets of grandparents to take with us on each trip).
Do what feels right to you and have a great trip - whenever it is