From the main menu, choose: Applications > Utilities > Remote Desktop Viewer
Click on the Connect button in the application window.
In the dialogue box:
In the next window:
You should now be connected to the instructor machine. There are some buttons That might be useful as shown below.
To get out of fullscreen mode, move your mouse to the center top of
the fullscreen. A menu should appear that looks like the following.
The first button will exit fullscreen mode.