Formative assessment is one of the most effective tools that teachers use to promote student learning and watching one's self teach on video is one of the most effective ways to improve teaching. As part of a project for the Michigan Department of Education, the authors worked with eight teachers in Michigan who are using videos of their teaching to improve their use of formative assessment practices. This article describes one of the rubrics used and highlights some of the improvements that the participants discovered for themselves. A discussion is also provided describing ways the learning teams worked toward facilitating their own enhanced professional learning using classroom observation and the rubrics to provide actionable feedback.