Classic teacher observations are broken, defying everything we know about best practices in assessment. There's the sample size problem, the onerous paperwork problem, and the "putting on a dog and pony show for the scheduled evaluation" problem. But most importantly, you simply can't use the same walkthrough to both give a teacher a grade AND use that walkthrough to give useful feedback. We know this from students. Formative feedback needs to be separated from summative evaluation for learning to occur.
Fortunately, Randall builds on the research of O'Leary and on his own practices to create an alternative system for teacher walkthroughs.
I disagreed with him on some of the details of how these alternatives should work, but agreed on the basic concepts like:
-- If instructional leadership is the job of the principal, we should spend at least a little time in classrooms every day.
--Stop using walkthroughs as the basis of formal teacher evaluation when you can-- instead measure professionalism, collaboration, and growth mindset.
-- Focus your energy on frequent, low-stakes feedback. Keep it low-stakes by eschewing rubrics and instead giving qualitative feedback.
--Start with the positives during your first visits. It's arrogant to give teachers constructive feedback your first time in their room. (That's the sample size problem.)
Overall, despite the parts I don't like (that walkthrough form is way, way too long, and I question some of the underlying beliefs about learning), this book is deeply needed, since the teacher evaluation and professional growth in most schools is deeply broken.