Interesting article! I have just released a game that uses multiple choice questions to teach travel English. I have tried to create an interactive story with normal conversations, rather than being given a 'You are wrong' message when a user selects the wrong answer. It would be good to hear what you think. You can check it out at http://www.megamegaenglish.com or on Facebook at https://www.facebook.com/MegaMegaEnglish Many thanks and good luck with the blog.