A calling system doesn't have to cost anything at all, it is an easy task for parent volunteers or even older students who are office aides. In a school of 275 students like this, with a absentee rate of about 20 per day as they had reported it to be, there would be just a handful of parents, if any, that forget to call in their child as absent. MAYBE 5 phone calls a day at most. All that is needed is that the school (not just this one, but ANY school) put the policy in place and educate parents about it by letter, school meetings, parent conferences, etc. Once parents know that it is REQUIRED that they call in, they will do so. Likewise, if they are informed that NO student leaves the building without being officially checked out through the office they will adapt to and follow that policy. The third step is that all absences are reported immediately to the school office for followup. NONE of these steps costs any money at all, it just involves a change of behavior that is not overly taxing on any of those involved.
jmoo