How long does it take to write a teacher evaluation? Commonly one to three hours per teacher, and 11 to 15 hours for a substantive one, mostly in the write-up, not the observation. What the research says, and how to get some of it back.
What to look for in the first five minutes of a classroom walkthrough: not the teacher, the learning. What the students are doing, what the room reveals, what the teacher's decisions show, and what the lesson says about the weeks before it.