By all means do not contact the administrators again as they know that you are
anxious to hear, but you do not want to become overbearing. It is still a
very competitive job market out there.
If there are large school districts in a commuting distance that you have not
applied to as yet, I would suggest you keep applying and possibly indicate on
your cover letter that with your experience you would be ready to start
immediately. If you decide to look for subbing, then it seems like it would
be best to try a school district in which you have not already worked to try
to broaden your base of opportunity. Is there any benefit to looking for a
full-time teaching assistant position as opposed to subbing as a way to get
into a school district? I am not sure what you teach - if it was special
education, then I would suggest that route, too.
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