I noticed the same thing today. I am a teacher also and have the answers in the comemnts for my quizzes. I tried to print a page with all the comments displayed, but it is not possible.
I am able to open my documents in the old version by right clicking and selcting "Open With" and then choose the older version.
If you don't want to go through this "right click" process everytime, you can right click on a document and select "Get Info". Then, in the "Open With" section select the old version of pages and click "Change All...".