I don't usually respond to these out of school for vacation threads, but now that I have had the experience of doing so I'm going to.
Last year I took my daughter (6th grade) and son (3rd grade) out of school in the middle of May for our first trip together to DW. I sent notes to their teachers that were very similar to the one that the OP posted. I chose to take them out of school for the trip for several reasons.
I work in an animal hospital, and while I have been there for 5 years, I am still low man on the totem pole when it comes to vacation time. This combined with summer being a busy time of year, I couldn't take a week long vacation.
I also was pretty sure that the kids would do fine making up missed work. The vacation was planned for right after the MCAS test (statewide assesment test) and I thought that since that was done, and the end of the year was coming up, that they wouldn't miss too much.
Lastly, I have been to Florida in the summer. Not fun.
I also had some serious "thought fights" with myself about it as well. On the one hand I thought, well geez, it's no problem for the school to schedule many days off for in-service, or holidays. As a full time working mom, it's a huge inconvienece to me to have to arrange alternate care for my kids on these days. For instance..just this month since November 1st, my kids have had 2 days off and a half day of school.
On the other hand I did give serious thought to how bogged down my kids would be with makeup work upon our return.
So I decided to do it. I sent the notes to the teachers about 2 months before we left, and I arranged for the kids to each have a camera, and a handmade journal to write down at least 2 educational things they learned or did while away.
What happened was the 6th grader was not given any instructions as to what her teachers (she had multiple) wanted from her while she was away. The 3rd grader's teacher gave him his assignments to complete while he was away. We brought half with us, and he finished the other half when we returned.
The 6th grader never made up her tests, or completed the homework that was missed. She didn't fail any subjects, but her grades dropped. The 3rd grader did fine, but he was overwhelmed when we got back.
This year I want to return to DW. We are going to go during the last week of school, and actually do 2 weeks. There is NO WAY I could take them out of school this year for any length of time. My now 4th grader's teacher is relentless with the classwork and homework. When my son was out for 4 days with a bad ear infection (he usually requires hospitalization, and morphine when he gets ear infections) his teacher expected every single paper they did in class while he was out, completed in 4 days (since that is how many days he was out)
And my now 7th grader is just not capable of being trustworthy enough to seek out, and complete missed assignments.
So I still have mixed emotions about the whole out of school thing. I do think that because of the material that must be learned for the kids to pass these state tests, the teachers are forced to pile on the assignments. Consequently, missing even a few days does seem to have a negative effect on their grades.
Just my 2 cents, I don't intend ot offend anyone, or speak badly of teachers. I think the days of individual teaching styles is over, and that's too bad, but it's the way it is.