Student may come at any time during the Meet and Greet.
Principals will be organized according to their partnership districts and each will have their own table. As you mingle, you will be able to visit the principals, ask questions, and learn more about their schools.
Although the Meet and Greet is less formal, you still want to present yourself professionally.
Don't worry about bringing your resume. This is a time when the future student teachers can get to know the principals and schools. This is in contrast to the interviews where the principal will get to know the students.