The document outlines the professional development activities of the math department at Stoller Middle School from 2005 to 2011. It focused on introducing and refining the use of proficiency and sufficiency models to assess student performance in mathematics. Teachers participated in monthly meetings and workshops to analyze math tasks, develop common assessments, and establish guidelines for evaluating student work. The goal was to build a collaborative community of teachers to improve mathematics instruction and implement proficiency-based assessment.