When you Think You've Hit the Ceiling

I have been working at the same job for the last year & a half.  During that time I have been struggling to balance work & school, but I have also tried to advance my station at my job.  I've been employee of the month twice & applied to for a manager position twice but to no avail.  I don't know if its all in my head or if I'm just not qualified for the position.  The cold reality is that I am not getting any younger but I just want to have a manager position on my resume before I graduate from college.  Right now I think I need to spend my time looking for a better job, something that will advance my resume until my teaching career takes off.