Click the + button on the bottom navigation bar to start a new post and upload photos. You can also click the Menu icon and then View Profile. Click Photos and your Galleries and Albums will appear.
You will be given the option to choose which album you would like to add the photo to. Please keep in mind that you may need to enable permissions for Classmates to access your phone's gallery.
All photos must be in an accepted, common image format (JPEG, PNG, etc.) and less than 10 MB in size.