Just unzip this into you savegame folder (instructions can be found online) and you can show you class first hand what is possible when you work together.
Walk around the village and check out the community projects. You may even want to use the village as a starting point for your own class projects.
You can view the village on https://www.youtube.com/watch?v=eDgGrLDqnZg
Be sure to check out our other awesome Minecraft resources