The two things I can think of (which I included in my rant to the SSC representative) are these: one, quit giving kids who ditch the opportunity to make up the work (thus afecting the grade, and providing motivation to come to class), and two, TALK to these kids about the importance of proper attendance. I don't think you have the same problem that other teachers have, but I know from student input that it sends mixed signals when I go postal about attendance in my office but the teacher hasn't said word one about it. "Mr. So-and-So hasn't said anything to me about it." I've heard this more than once.
In the end, I don't know why anyone cares. We're a basic-aid district, so our finding isn't affected; teachers seem fine to teach these kids in absentia. If that's the case, I wish those above me in the food chain would get out of my face about it.
And what do you recommend the classroom teachers do -- specifically?