I have an 80% attendance requirement whether it be for Dr., make up exams, sick, whatever. This is to compete. If you go below, you do not compete until you are above. If you stay below, we will discuss whether you should be on team.
I constantly think it is too liberal and would love to tighten it up. I have also toyed with the idea of making cuts. Bottom line is I found my top kids are always at practice. Amazing how they can make practice a priority and others don't. One issue I see, I'm sure you all do as well, is that these kids are way more over committed than we were. They all have to run, be in AP classes, band, club, volunteer, etc. all in hopes of getting into a big school so their parents can brag about them. And in the end, after your first job, it probably won't matter where you went. In some ways it is sad how much pressure these kids are under.