Hypothes.is is a great tool to keep students engaged! The forum space is perfect for comments and feedback, letting you also have a conversation with any editors, proofreaders, and other collaborators. I’ve seen your call for reviewers/editors – it looks great! 
If you wanted to share a quick version in this thread: Spread the word in the Rebus Community newsletter, @LeighKP will make a note to include the call in our newsletter and other social media channels. Looking forward to seeing how it is received!