At first I thought the OP's panic was over the top. But then I remembered some of the draconian threats that appear to be routinely leveled at parents who've enrolled their children in American school systems.
Truancy court?
CPS called if your child is out for three days in a row without a doctor's note? Which costs the parent money out of pocket? There are SO many illnesses your kid can get that will keep them out for three days, but which don't require a doctor's visit. Also, do they really want people sending their sick, contagious kids to school?
Zeros on all their assignments, regardless of whether they know the material or not?
I do realize the way the funding is set up in some districts, every student not physically present is costing the school money. And I also realize that many parents have no other choice, financially. But it must be very uncomfortable to be forced to surrender that much parental authority.
It's also sad when an attendance policy has less to do with education, and more to do with money.
I'm SO glad Ontario schools are funded differently. They get money for each student regardless of whether or not the child's butt is in a seat. My dyslexic son was encouraged by the SERT to take a "mental health break" for a few days in Grade 9, because he was finding class stressful. When my daughter was in 10th grade, and trying to decide whether to take a week for Disney, her teachers encouraged her to do it. To quote her Chemistry teacher: "Go! Go! Next year you'll be focussed on getting your grades up for early admissions. This is your last opportunity to do this with no consequences!"
To the OP - in our schools, it's just courteous to let the teachers know ahead of time that your child will be absent for a few days. I'd usually mention it at the first parent-teacher meeting in September, then send in a reminder note about a week before the vacation. I also let the office know the dates we'd be gone at that time, so that they didn't end up calling the house while we were out of town. I didn't ask teachers to make up any special work packages, and they never offered to send anything with us. What they did sometimes do, though, was allow my kids to take tests either the week before or the week after during their lunch hour.