The only game in town for most of my area (Twin Cities - excluding Minneapolis) - Long Term Substitute Teacher Teachers On Call Employee Review

There are *always* openings, not necessarily for long-term but for shorter stints if that's what you choose. But non long-term pays less. The rate also depends on which district you sub in. They do have training in the form of lectures and webinars, which are usually pretty good. This also gives you a chance to interact with peer subs. I really love long-term because you get to know teachers and students and because there is no hassle with teachers meetings, grading papers, report cards, etc.