Using the Chrome Remote Desktop App (still in beta) you can grant access to your computer to another person who also has the Chrome Remote Desktop App installed.
If you want to share your desktop just click "share now" and Chrome Remote Desktop will generate an access code to give to the person who will access your computer.
To access and control another person's computer you just need to enter the access code that they provide to you.
Applications for Education
The Chrome Remote Desktop app could be very helpful in aiding teachers and students when they get stuck trying to accomplish a task on their computers.