Here's a school based on one that I know in real life.
It's taken about two days to complete the majority of it.

Edit:
I have uploaded the world file for people to download. Feel free to add it to your saves folder and try it out :)
I will upload any major edits, and also when it is completely finished.

Update:
The project is nearing completion, and the world file download has been updated. Stay tuned for the full release.