Google announced that soon we would be able to create shared photo albums on Google Photos. This week that became true. Now you can collaboratively create photo and video albums through Google Photos. To collaborate on an album simply create your album then share the link to your album much like you would do with a Google Document.
Applications for Education
For years I have recommended that teachers create a shared Google Drive folder that students can access to find pictures that they can re-use in multimedia projects. Using the new Google Photos shared albums feature could be a great way to have students contribute pictures they've taken to a shared album for classmates to access to find images to re-use in projects.