Here is a chart from NCSM with three commonly used coaching models.  The chart has brief descriptions that will help you see which model you mostly align with.

There is a lot of research that suggests embedded professional development provides high leverage learning for teachers.  Here is a chart we've designed to highlight four variations on a structure used to support teachers learning in the classroom while students actively engage in mathematics activities.

Learning Labs or Collegial Visits or Math Labs are all names given to the professional learning routine where teachers visit one another’s classrooms facilitated by a math coach or specialist.  This paper analyzes one aspect of these visits, the “teacher time out”.  Read more to discover what this powerful move can accomplish.

The TRU Conversation guide is an invaluable resource that helps structure discussions about the teaching and learning of mathematics.  This document provides an overview of the beliefs and intentions of any TRU math resource.

This TRU Conversation guide is a tool with focus domains and guiding questions to help center conversations on important student learning for mathematics for pre and post classroom visits.

The research is clear that embedded professional development should be a goal for all districts.  Lesson Study is one way to do it.  This article by Ellen R. Delisio has some helpful descriptions for how to go about it.