Sounds like your employer may not even call you back. But is that a problem ? Not in My mind ! This may very well be a wake up call for you - Time to find a better place to work ! You say this is a public school ? Does the person in charge of this project, from the local school board , know of the potential for a law suit? Say a worker falls and is injured or worse is KILLED by this most unsafe work practice. The contractor closes up shop before anything is settled, the school board is next in line.
I would
1) RUN and find new employment ASAP
2) Inform OSHA
3) Inform people in charge from school
As far as getting paid " the rate" it depends on the amount of money spent on the project and where the money comes from - (local,state, federal )