The document discusses the role of proficiency-based teaching and learning where a proficiency teacher guarantees that every student is learning and progressing. It introduces Steve Boynton, Superintendent of Arlington School District, and Rinda Montgomery Conwell, Assistant Superintendent of North Central ESD, who discuss proficiency-based models. The document then outlines various questions and details about defining proficiency, the Arlington proficiency model, and how to build a proficiency model in a school over the course of a year.