Statewide Demonstration Project: An Analysis of California Healthy Kids Survey Data. The California School Climate, Health, and Learning Survey (CalSCHLS) system is the California Department of Education’s whole child and school climate measurement system. Consisting of student, staff, and parent surveys, it is designed to engage local districts, schools, and communities statewide in a data driven improvement process to identify the strengths and needs of students and schools and to improve school climate, academic performance, and the social-emotional, behavioral, and physical health of all youth. The student surveys, known as the California Healthy Kids Survey (CHKS), are currently administered by over 66% of school districts in California to over 1.5 million students every two years. The purpose of the CHKS data analysis is to examine statewide trends in student well-being prior to and during the pandemic, and to conduct experimental analyses to demonstrate how the CHKS data can be used to explore the impacts of state and local initiatives designed to improve students’ social, emotional, and mental health.