Google Cardboard is a very cheap ($20) way of enjoying virtual reality applications. Even though applications for education are still in their infancy, there are a couple of interesting apps for schools, like the guide of Versailles palace or Streetviews included in the Cardboard demo app.
If you have already tried out Google Cardboard app you might have wondered how you can view any Streetview image, and not just the ones shown in the demo app.
Here is the trick: you need the latest version of the Google Maps app. In the lower right corner there is an icon that lets you view the streetview in a look around mode. If you double tap that icon you get a spilt VR image. That’s all. Now you can enjoy the streetview in your Google Cardboard.