It's expensive, just to warn you.
You need something like the Vive or Oculus Rift, then you need to pair it with a "VR ready" gaming PC (either by buying one or building it yourself). Minimum requirement would be a single GTX 980.
However, you will need software that can run VR, and for education like you desire to use it for, I think you need somebody to create it for you since VR is so new ATM.