How to copy forum structure Advanced Forum? I wish to use the Forum or Advanced forum module to create forums. But to save time I need to duplicate forum structure to create new ones. I've done Google search but did not find any useful information.

For example for a schools website, I can create another school just by copying a school structure that'll copy all child forums as classes which I'll not need to recreate.

Can anybody help me with this?
What you should do is something like an Install Profile: https://drupal.org/developing/distributions

You can create Install Profiles from exiting sites with:
https://drupal.org/project/profiler
https://drupal.org/project/profiler_builder

What I would do is make the first site exactly how you want it and then turn that into a Install Profile.

An easier way to do this if you have AEgir is to just clone your first site and then keep it as a template to clone others.