Teachers aren't randomly selected from the population; they more or less all have bachelors' degrees, and generally they have further qualifications in teaching. So the appropriate point of comparison would be something more like holders of masters' degrees.

According to http://www.bls.gov/emp/ep_chart_001.htm the median salary for an individual with a master's degree in the US in 2014 was $1326/week or about $69k/year.