You can test the Game Area yourself by using two browser windows. In one window, you can login with an account (for instance, your Coach account) and login with a student account in another.
After logging in as a Coach in one browser window, you can press the shortcut key Windows key + Left arrow key to resize the window to the left side.
Pressing Windows key + Left arrow key to resize the window to the left side
Now in the other browser (or the Incognito window of the same browser), you can login with a Student account. Then press the shortcut key Windows key + Right arrow key to resize the window to the right side.
Pressing Windows key + Left arrow key to resize the window to the left side
Now you will see two windows (one with coach and the other with student) on the left and right side of your screen. Invite the other account for a game and start playing yourself: