Charter school authorizing is inherently contextual work, and each charter school authorizer is the expert on their own context and portfolio of schools. This toolkit is a self-guided resource for authorizers to "identify" indicators of distress, "audit" their current data collection methods for evaluating indicators of distress, and "assess" whether and to what extent the schools in their portfolio are showing indicators of distress. It builds on National Charter School Resource Center's (NCSRC's) earlier report "Identifying Indicators of Distress in Charter Schools, Part 1: The Role and Perspective of Charter School Authorizers" (ED609911), released in 2020. By focusing on these research-based indicators of distress, rather than just indicators of failure, charter school authorizers don't have to wait for schools to fall into full organizational failure before acting -- and more students might be saved from the negative impacts of a failing or closed school. [For "Identifying Indicators of Distress in Charter Schools, Part 2: The Roles and Perspectives of Charter School Leaders and Board Members," see ED616211.]