This report builds on and updates many of the findings from the original nationally representative survey of Pre-K to 12 principals in 2017. The central messages of this 2019 update are: (1) principals continue to see social and emotional learning (SEL) skills as highly teachable and a priority in their schools; (2) more schools are implementing specific SEL benchmarks by significant percentages; and (3) principals and teachers are assessing SEL skills at much higher rates than just two years ago. At the same time, the survey shows that more work is needed to ensure SEL is systemic across schools and districts and for principals to think existing assessments are useful. The most significant findings in the report, compared to survey data in 2017, are: (1) the percent of principals that believe social and emotional skills should definitely be included in state education standards has nearly doubled since 2017 and, all told, 87 percent of principals believe state standards probably should explicitly include SEL; (2) the percent of principals that believe a formal curriculum is necessary for teachers to successfully develop students' social and emotional skills has jumped from 43 percent in 2017 to 70 percent; and (3) while schools have made a great deal of progress implementing social and emotional learning, small town and rural schools continue to lag significantly behind the rest of the country. Most of all, this report shows that the movement to embed social and emotional learning into every classroom and school in America has reached a tipping point. Principals stand ready to bring systemic, school-wide SEL to their schools, but they need greater support from leaders at the state and district levels to ensure every student has access to a high-quality education that nourishes their social and emotional skills along with academic learning. [For the 2017 report, see ED579088.]