Sarah Johnson's work begins long before the school bell rings.
First up is a meeting with a fellow teacher to talk about how a lesson was paced. Did you finish before the class was over? Did students have a chance to ask questions? Did they seem interested?
As one of nine teachers trained to evaluate first-year educators in St. Paul Public Schools, it's her job to identify the teachers who are excelling and those who are floundering. It's up to her to help them become better teachers. Never has that job been more crucial.
"I think all teachers are feeling a sense of urgency and a need to improve," Johnson said.
How teachers perform in the classroom is under unprecedented and intensifying scrutiny in Minnesota, where all of the state's 52,000 public schoolteachers will soon be subject to an annual evaluation for the first time.
Adding to the pressure, would-be teachers will have to pass a basic-skills test before they even set foot in the classroom. Teacher seniority protections also are under fire from lawmakers and parents eager to make educators more accountable.
"It feels like a number of issues that have been whispered about for years are now being turned into action," said Charlie Kyte, a longtime educator and former executive director of the Minnesota Association of School Administrators.
Minnesota is among a growing number of states grappling with how to tie teacher evaluations to student performance with a system that's meaningful and fair.