Every morning, Rebecca Sheehan-Stross and her kindergarten students, sitting cross-legged on the floor, start the school day by counting up the time they’ve spent together at Cesar Chavez Elementary in the Mission District.

“How many days?” Sheehan-Stross quizzes the kids once the tally is done. The children call back: “141!”

The students’ number of days at Cesar Chavez will keep growing, but Sheehan-Stross isn’t sure how many more she will spend here. She loves her job but is considering leaving because she can’t afford a decent place to live.

If she goes, she’ll add to the growing ranks of teachers and classroom aides who have decided that working in San Francisco’s public schools isn’t worth the sacrifices they have to make — moonlighting as babysitters, cramming into apartments like college students, or renting other people’s dining and living rooms to get by.

It’s well known that San Francisco has the highest median rents in the country, but what’s largely unknown is that its 3,292 teachers earn less, on average, than those in most other California public school districts. Many cities where it costs much less to live — Modesto, Newark and Long Beach among them — pay teachers more.

Read more here: http://projects.sfchronicle.com/2016/teacher-pay/