My school's going through its charter renewal now. Very different from the charter renewal process in New York, which was a yearlong, ulcer-inducing gauntlet for the schools I worked with there.
Our sponsor (or authorizer), the local school district, hired a team of three current and former teachers and administrators to conduct the site visit. Today, Day 1 of their two-day visit, they met with school leaders, students, and parents. After school they met with the teachers (no school leaders) and asked us some general questions about the school model. Tomorrow they will be sitting in on classes.
No one seems too concerned about the charter getting renewed. Stay tuned.