How do you install extension modules for the system such as bulk import of students, staff and subjects

Hello, the module you are referring to as an example is Data Admin (I believe). If you download this, or any other module, you can unzip it, and then for most modules, the main folder in the ZIP archive contains a subfolder with the exact name of the module. This sub-folder can be moved to /modules on your Gibbon server. In some cases, you may need to rename the folder so that it is exactly the same as the module name (as listed in the manifest.php file).

Once the folder is correctly named and inside /modules, go into the Gibbon interface and go to Admin > System Admin in the main menu and then Manage Modules in the module menu. In the Manage Modules screen, you should see your new module listed, but marked as Not Installed, and coloured orange. Click on the Install icon to install it.

All going smoothly, the module will be installed and activated, and will appear in your main menu.