Last year is the only year we ever ran into what could of been a problem. My dh is a first grade teacher in a different district than our kids, so we vacation on his breaks. Our son started middle school that yr so we werent real familiar with different policies, figured they we district wide. Well, informed the school and each teacher just after Christmas break that the kids would be missing a week of school in March. Our dds school was like thats fine have fun, remind us later and we will get you her work. Nothing from my sons school. So February came around and I decided to call and let them know, well the office informed me that they have a 10 time absence poilcy, weather he missed from being sick, vacation, whatever, they only excuess 10 for the year, after that it is up to the teacher if they will allow the student to make up their work and if they will give full credit for it. Ahhh
Anyways, I called and talked to the teacher and luckily all except one told me not to worry about it, the other was a weird teacher and he never shot straight with me. So, we went, had a blast of course, and he did all of his homework in advance and turned it in before we left and there were no probelms! Now we are planning to go Sept 5-12th so they will miss 3.5 days of school, hope that works out ok, and not sure if we will still go in March like we usually do or not, just have to wait and see.
Anyways, to answer the question, I usually give a early notice, just to let them know there will be a londer absence sometime durring the year. Then a few weeks before, I remind them and hope they give us the work about 1 week in advance so we can get it done and turned in, no since in homework while on vacation! ....sorry so long!