Two-way Entity Reference? I'm building a site for a school, with several content types:


A Class holds the general info about a class: description, tuition, etc. One field in the Class type is an Entity Reference for an Instructor.
An Instructor is the teacher of a Class.


When adding a new Class, the user will add an Instructor using the Entity Reference field (as an "autocomplete" widget). However, I also want the list of Instructors to link to the Classes each one teaches. How do I do this without having to enter the data on both the Class page and the Instructors page?
Actually found a great tutorial which explains in detail how to do this: Using Views Contextual Filter and Relationship to display reference on referenced node. 

Now, I have another, related, question: What if I want to include the Classes taught by the Instructor on the "list of instructors" page (which is a View)?