Why can't I find a decent job?

It is so weird. I keep getting jobs, and they never seem to be good. I have a college degree, and I figured that would get me jobs that I enjoy. However, I keep applying, and I keep getting sucky jobs. Mainly jobs teaching, which is what I wanted to get. However, they are always at bad schools. The good schools seem to always have filled positions. I seem to always get jobs at poor performing schools. Why is that? I hope someone could answer. Thanks