Firstly, the signs are saved in a specific way on MinecraftEdu. The texts on the signs are in a separate file within the world save. If you place each of the students' rooms in structured grid, it should not be too difficult to copy/paste the texts on these signs in the file and change the coordinates. The other option would be to do all of them over by hand and in-game.
Secondly, I am assuming that you are using CustomNPCs. The Home coordinates of an NPC are stored within the creature, so if you copy/paste it to a new location it should walk back to its original Home.
CustomNPCs has items called a "mob cloner" and a "soul stone" which can help you pick up/clone NPCs. Placing them back down this way will also set their new Home coordinates, so they won't wander back.
Op maandag 2 november 2015 18:22:16 UTC+1 schreef Andreas Schenkel: