AR/VR
VRroom - Free online tool for teachers to create a safe and controlled VR space for up to 30 students at a time to talk and interact virtually.
Augmented reality
The best augmented reality apps that aren't Pokemon GO
3 tips to make AR VR experiences great in your class
ditchthattextbook.com/2019/03/04/6-ways-to-start-using-augmented-reality-in-your-classroom/
mashable.com/2017/05/17/google-ar-expeditions/#yq64.fOiKaqt
Virtual reality
Free Technology for Teachers: Make Your Own Virtual Reality Headset
make your own google cardboard---manufacturing-guidelines.pdf
DIY You Virtual Reality Headset - Google Cardboard
How to make a VR headset for 0 $🔴 - YouTube
Ancient Jerusalem in VR - Android Apps on Google Play
10 of the best virtual reality apps for your smartphone | Technology | The Guardian
Free Technology for Teachers: Three Interesting Studies on Virtual Reality in Education