Step 1: create a shortcut on your Sites page
Go to the sites page, and click on the 'Manage' link in the top left.
Click on 'Add a promoted site' to open the shortcut modal. Give the shortcut a title (e.g 'Student Dashboard'), and then paste the following URL in your clipboard into the 'Link Location' field:
The 'Description' and 'Background Image Location' fields are optional, so you don't need to fill them out. However, if you want your new shortcut to display with the Student Dashboard logo, paste the following URL into the 'Background Image Location' field: http://www.teacherdashboard365.com/SDAppShortcut.jpg
Step 2: that's it! You're done
That's all there is to it. When you return to the Sites page, you'll see you new shortcut ready for use.