In a previous position, I used to get this question a lot: "Why do all of the ______ kids stick together?" Domestic students would ask it about specific nationalities. International students would ask it about students from the US. One particular time stands out, when an English language and culture class asked their instructor why all the Americans stick together, why it was so hard to make American friends, etc. She asked me to come and address them. 

The first exercise in this collection--Language Envelopes--is how I jumpstarted the conversation with that particular class. The rest of the collection contains experiential activities that I wish we had had time to work through that day. I share them in hopes that, if you are asked the same question, you will find them useful.