Take them out of school. Here is my story. Our first trip to WDW was a "Make a Wish" trip for our daughter. Her brothers were in high school at the time. When I went to conferences for the boys,and told the teachers we would be taking the boys out of school for our trip, one of the teachers gave me a hard time. I said, you know this trip might be the last trip we all take together as a family, and I don't think any amount of school work would be more important. Things worked out for our daughter, and the boys suffered no real damage, but the next year at age 16, our son was killed in a car accident. I am so glad we took that trip together as a family. Life is to short to worry about the small stuff. Go and enjoy.