1. Click on the display name in the upper-right corner of the screen.
2. Select "Account".
3. Click the "Google+ Connect" heading.
4. Sign into the Google account you wish to connect to Planbook.com.
5. After that is connected, you'll see the specific calendars and classes in your Google account on the "Account" page. Check the box corresponding to the classes you wish to display in Planbook.
6. When finished, save the changes by clicking the check mark button in the upper-right corner of the window.