You can choose to sync and share photos you've posted on Facebook via the Facebook Connect option. Shared photos will show on your Classmates profile Gallery section along with any photos you've posted directly through Classmates.
Photos you and other class members have shared will also display on your Class Photos page. (Keep in mind that you must be Facebook Connected to view that particular page of shared class photos.)
To connect to Facebook, simply choose Log in with Facebook on the main login page.
To stop sharing Facebook photos, click the gear icon (gear icon image goes here) in the orange bar at the top right of any page, select Account and then Privacy. Switch the Facebook Photo Sync to off. Click Delete synced Facebook photos to remove shared Facebook photos already posted on the Classmates site.
Note - As long as you are using the Facebook Connect option, the Delete synced Facebook photos button will always be available, even if you are not synced to Facebook. Your photos will not reappear as long as you have Facebook Photo Sync switched to off.
To review or update your Facebook Connect and Photo Sync options, visit your Account Privacy page, found under the gear icon in the orange bar at the top right of any page.