Joseph,
At an MO school, most rebbes/morahs are only there from davening in the morning until the end of limudei kodesh(approximately noon or 1PM). These folks can expect to make 15k-25k, depending on the individual’s credentials/education and the school itself.
There are some Judaic studies teachers that stick around all day, but they tend to have more than one role in the school (e.g. a Israel yeshiva guidance counselor). These people should expect to make in the 40k-50k range, but also tend to be more modern themselves, as they have a role in which student interaction and student relatabilty become vital characteristics. There have been frummies in these roles as well, though.
-source: My years involved with several MO institutions in the NY area.