As how they make a reliable income… most substitute teachers I have known have been part-time. Sometimes it’s someone in grad school who works part-time only while they focus on school. I have known a few that were full-time moms but did substituting once or twice a week. I have also known a few retired folks who worked as substitute teachers. I don’t think people necessarily do it for the great income, but do it because it works well with their life situation or circumstances.
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