Although hundreds of designs and protocols for professional learning have been developed, few have been as widely embraced and studied as the CASL (Collaborative Analysis of Student Work), model developed by authors Colton, Langer, and Goff. The Collaborative Analysis of Student Work is a comprehensive guide to implementing a research-based approach to professional learning that drives educator effectiveness and promotes learning for every student. This new edition will be thoroughly updated with special focus on the following: - how to use the CASL inquiry process to help teachers clarify what it looks like when students reach complex academic standards such as the Common Core and Next Generation Science Standards - use of CASL in teacher evaluation -use of the CASL inquiry process helps teachers to specify and define their professional learning goals -how school leaders can play pivotal roles in successful implement of CASL -how CASL can specifically benefit Culturally and Linguistically Diverse learners -significant updates to facilitation coverage.