• I have a list of topics. There might be ten or a dozen. 
• I want students to find and share online resources explaining those topics.
• I would like more than one student to 'cover' each topic.
• But I don't want half the class doing one topic.

You're experienced at using Canvas.

How would you handle this in Canvas?

Is there a specific tool you think makes sense? An LTI?

The ideal solution is elegant: it's simple and involves the least amount of work for students and the instructor.

Things I've thought of which I find inelegant:

• Create a discussion board with a prompt containing the list & ask students to choose, first-come, first-serve.
• Create a Google Doc, and ask students to add their names.