Lowering expectations

I have a physics degree, and have been working as a teacher, but am looking for a new job. I initially wanted to get into engineering, but obviously had no chance at any jobs in that field. I keep lowering my expectations more and more, and am having no luck at all. I want to do something with math and science, but am ready to completely give up. I don’t want to go back to working in a restaurant, though. Does anybody have any suggestions for what kind of job title to look for if I have no relevant experience? “Entry level” doesn’t seem to exist.

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