When I read your post I just recalled the Interview that I heard yesterday which was given by one of Chancellor of the Exchequer during the World economic forum in Davos, that she gave learned by heart paragraph even the way how the person was telling that you could feel that it was learned and simply citied. After that she was answering to questions and then it was noticeable that she was answering with her own words with some examples and that part was good and interesting.

Maybe that is typical for us, human, that often we go easy way, simply learn by heart the correct text, then we do not need to think much but those texts will be forgotten as quickly as quickly they were learned.

I really enjoyed the way how you build up the structure of your classes and I am sure the people they do think, plan and express their thoughts and ideas, they are able to discuss and they definitely will not easily forget them :)