Teachers are the single most important classroom factor in student learning and achievement. Research demonstrates that the greatest influence on learning progression is having highly expert, inspired, and passionate teachers who work with school leaders to maximize the effect of their teaching for all learners in their care. The effort to educate every California learner is an incredibly complex undertaking. Thus, continuously strengthening the teaching profession by equipping teachers with effective practices based on available evidence is critical. Moreover, because what teachers know and are able to do directly influences student learning and wellbeing, educators must have a deep awareness and understanding of what quality teaching looks like—and of how to implement it for every student every day (https://docs.ctc.ca.gov/).