When I missed school for my grandfather's funeral the only thing the school said was "so very sorry for your loss, let us know if there's anything we can do to help." I can't begin to imagine a situation when any school - preschool through college - would be anything but sympathetic and supportive of students whose loved one just died. (And really, it's not unusual for a grandparent of a high school kid to die, so you'd think they'd have a reasonable and comforting policy in place!!!)
Vacations we can argue about until the cows come home, but funerals? Who the heck does that Principal think she is? Totally blown away by this...
Unfortunately grandparents seem to die often around exam time in college. One of my former jobs was in a college student services and I was required to get copies of death certificates before releasing makeup exams to professors for grading. I could allow the student to take a makeup exam but it sat locked in my office until I got the copy. Death annoucements in newspapers, funeral cards, letters from funeral homes all not allowed because people had fakes them in the past to get out of exams. It's sad but true.