This series of drawings struck me as something that might be useful to spawn conversation. Some Drawings are more controversial than others, but several hit on topics that I think some classes are already discussing, especially the upper levels.
This is great! It has reading, writing, conversation starts and grammar exercises. For example, there are dialogues with questions, jokes and riddles for reading, and learning about topic sentences for writing. All of these come with follow up worksheets that you can often turn into nice pdfs. All sorts of categories are available for you to choose from.