Question:
Is there any way to create a repl in Teams for Education that I can give read-only access to my students to? I would like them to be able to follow along/refer back to a class notes repl we did in class, but I do not want them to be able to modify that class notes repl.
No, this is currently not a feature.
If this helps, please mark it as a solution, if not, feel free to ask away! 
Hey @dvermes !
This is not an existing feature, but you can make a request at Feature Requests .
Hope this helps!