Very good point, that's a salary you can live very comfortably on. Seems like it just depends on the school district, but I'd say the authors main point, that salaries across the board for teachers are lower than they should be given how hard the job is and how qualified most teachers are, still holds true.
Are our public school teachers unfit to be teachers and low-quality workers because not high enough wage is offered for quality people? Or is it that the salary attracts competent people but other factors are broken?
The interesting thing to me is I see people almost universally praise our teachers, and comment on how great and caring they are. The money seems to be attracting the raw talent, so I'm leaning towards something else is much more broken in our system.