I just talked to two of my kids teachers today(they are in grade 3 and 5). We leave next week already so I wanted to give them a little notice. I felt so bad introducing myself and in the same breath explaining that I was taking them out of school next week already. They were both great and said they would try to put a little work together. I told them that would be great but not to go out of their way....the girls know they will have some make-up work. As far as telling the office for attendance reasons, I just tell the secretary when we will be gone and she makes a note in her calendar! (must be a lot more kids that take holidays during the year!) My son doesn't start JK until Friday either so I will talk to his teacher then.
You're pretty close to us, I wonder if you'd have the same 'rules' as us. I have to fill out an "extended absense" form which the principal has to approve!
I'm also wondering if having a teacher with a straight grade-4 class this year, it will be easier for the teacher to give work in advance than having a split-class, which we've always had to deal with in past years.