Penalty for leaving

Hi All,
I recently accepted a position at an ADN school and thus far have been very disappointed at this school. I have recieved little to no orientation. I have nonexistent prep time for lecture and a difficult commute to work. Considering all of these factors plus the fact that the director is difficult to work with I have decided that I do not want to be there long term. I really would like to give notice NOW. My question is, I signed a contract for the semester and do know how resigning will affect me. I fear that if I resign even with lets say a 30 day notice that I will be blackballed in the education community. Thoughts, suggestions please.

Basically, what is the penalty if you resign and leave your contract early?