Also talk to the school, see if they have any jobs for students who need them.
Is there any place near enough that gives day work? (check with employment office) Generally you show up and get paid for the day, usually unloading trucks or things like that.
It might be worth it to do volunteer work, choose a place you might be able to work in (eg: a health care facility (kitchen, housekeeping, personal caregiver, etc) or other ...
Do you know anyone who runs a small business? (if yes, ask...)
Try restaurants if you haven't---high turnover, generally needing help these days
Widen your search, put out lots of applications....
Hang in there....I know how tough it is