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I bought a book called Active English Discussion (http://item2.gmarket.co.kr/English/detailview/item.aspx?goodscode=340604874 ) and used that with my students for night classes. They have the types of conversations you are talking about. The book starts with an activity for the students to talk about/do, and then the 2nd page has an article to read. I did a translation with the students of the words they didn't know, to give further understanding of what they are reading. The following page is 10 questions about the article and the topic in general, to make the students think more in depth about the topic, and then the 4th page sets up a debate. This book was invaluable for my students. I just photocopied the pages I needed to use, and spent 2-3 weeks on each topic, as I only saw these students for 45mins a week in a night class. They really enjoyed the topics, and with 15-20 topics in the book, there was more than enough to last them the semester.There is a second book available as well (http://item2.gmarket.co.kr/English/detailview/item.aspx?goodscode=227952902) both have teachers guides if you feel you need to locate those as well, but I did just well with one book. I paid for the book, so it's mine to keep, and I can use it if I move on from Korea/ this school with students elsewhere. I found this book really useful for creating guided debates, and if your students are advanced enough, you may be able to get them to create their own debates based upon the guiding of the ones in the book. There is another book that I use with adult student, Impact Issues, (http://item2.gmarket.co.kr/English/detailview/item.aspx?goodscode=318950403, http://item2.gmarket.co.kr/English/detailview/item.aspx?goodscode=318950323, http://item2.gmarket.co.kr/English/detailview/item.aspx?goodscode=318950284). These books have a script/story first, and then questions and ideas to write on, but you can adapt these again, to suit your needs. Check out the links, I think almost all of them allow previews to the books so you can see for yourself what kind of thing you would be working with. You have the choice, of course, of asking the school to purchase a class set of books for you, or having the students buy their own books, or just photocopying the one book, as I did. I hope this helps you a little.