So average salary was 50k, she got free pension, 3 months off a year, and didn't pay for her benefits. IMO that's worth wayy more the 15k less in income.
Any teacher worth the name knows the whole '3 months off a year' thing is BS. My mother is a teacher and after she puts in her normal day at school, she has after school activities she runs, before going home to grade papers. She easily works 10-12 hour days during the week.
There are other jobs that require that too, yes. The fact is though, that teacher's day is probably quite a bit longer than most people making $35k.