Physical Access control for PCI compliance

We are currently working toward PCI compliance.  We have a school in our building and are wondering if other similar non-profit organizations have gone through their PCI audit.  We were wondering:

 

How you treat vistors and students in the buidling?

What access control mechanisms did you put in place?

Maybe see a copy of your policy document for the Section 9.

 

I would appreciate any assistance and information with this project.

 

Thank you.