How it works

As a sub, there are three similtaneous systems running seeking people for places. There is an internet service posting slots for filling. This is linked to a phone service that calls people about these same positions. The sub office itself receives calls and makes them, trying to fill places. This is all for substitute teaching.

How it fails:
I got a call today from the phone service ... answered it, "I'm sorry. The job I called you about is no longer available. Goodbye." Since the calls may start at 5:00 am (times available to call can be changed), being called only to find out that it isn't available, doesn't start you off to a good morning.
Internet service working, but phone not ... or phone working and internet not working.
Internet and phone are working, but don't show same offerings.
The internet is based on a database that may be out of date. Sometimes teachers shift from grade levels or to schools. I have found that sometimes, the listing is for the wrong grade. Why does that matter? Imagine going in to work with stuff for Kindergarten (often two half days), but instead, having 5th grade. Yes, this has happened. More often it is that the teacher shifted 1-2 grades or has changed to a "resource teacher" who doesn't have a room and has a hap-hazard schedule that is unclear.