This is a strategic initiative to position us with improved UX for teachers.

Detailed use case / user journey can be provided. 

Some details from Unsplash:
API Documentation: Here's where you'll see some of the features we do around dynamic photo sizing, collections, orientation filtering, etc.

API Site: Here's where you can signup to play with the API. You're given 50 requests/hour for testing purposes, but I can bump you up your requests if needed. And once you're ready for launch, I'll can completely remove all rate limits by bumping you to VIP status.

API Guidelines: Here's where you see the guidelines around the API (crediting, tracking, etc).
 
Examples of Attribution: Here's where you'll see examples of how other partners have applied attribution in their UI. You do not need to follow this same pattern, but I thought it would be helpful to share examples.
 
Here's a list of some of our most recent notable partners. 
 
And lastly, here's an article written by Canvas about the Unsplash integration replacing Flickr.