I understand that it is difficult to determine which forum to post in since there are so many. This particular forum (sharing and storage) was created to help those transitioning from Photoshop.com to Adobe Revel. I am moving your post to the correct forum so that it can get proper attention.
I'll put I this posting in the Premiere Elements community so the experts there can help you.
We also have many other forums relating to other Adobe products
Out of curiosity, can you tell me how you found our forum page?
Just a note that this is a user-to-user forum, and Classroom in a Book was written by the Adobe team. So you may need to contact their tech support to get an answer to this specific question.
I do have my own step-by-step instructions for using this feature in my book, if you're interested. But I've never seen the Classroom in a Book book, so I'm afraid I can't help you there.