If our school is blocking the WIFI app, is there another service or prgram to use while testing and running this event? The school says its a safety issue.

We assume this is with regards to the suggested nirsoft.net software for Windows. There are numerous other WiFi analyzer apps available in the Microsoft App Store that perhaps they would allow. The key is to find one that will display results in dBm. There are also apps like Airport Utility on the iPhone and other apps that can be used.