Hi Lauren,
You only need one Master page, and there's no need to put anything on it unless you want a header/footer that repeats on each page.
If you want to have things flow from page to page, create one body page object, and set its content type to Flowed (the body page is itself a subform). In it you put subforms with text, fields, and so on in them. Since your form will spill from page to page based on how much text the instructors type into the expandable comments fields, break up the forms content into sections (subforms) such that the layout can break between the subforms without taking away from the readability. These subforms should have a content type of Position. Even though there's only one body page object in your design, since you have three pages worth of stuff, it will spill onto three pages.
Now for the comments fields, which you want to wrap and expand. Make sure that each of your comments fields is in its own subform. Set the field to allow multiple lines and, in the layout tab, click the box to Expand to Fit (height). For the subform that contains the comments field, set the height to auto-fit (layout tab). Also for the subforms that contain comments fields, experiment with the "Allow Page Breaks Within Content" checkbox on the Subform tab. If you expect an instructor to blab on for more than an entire page of text, you will have to select this box, but otherwise I suggest leaving it unselected so that the entire comment remains together.
Jared Langdon
www.jlangdon.ca